- Email: [email protected]
Microprogram sequencers
. . . and from Hitachi
11-bit memory driver
Hitachi has produced a CMOS microcomputer which it claims to be the first 8-bit single-chip ZTAT (zero turnaround time) computer with an on-chip A/D converter. The HD63705Z has 68 parallel I/O ports, a serial communications interface, eight channel × 8 bit A/D converter and a slave processor mode allowing its use as an intelligent peripheral. On-chip memory consists of 8 kbyte of EPROM and 384 byte of RAM. The chip has five 16-bit timers and a software programmable pulsewidth-modulation timer. Packaging is in a flat pack either with a window for EPROM programming or as a windowless one-time-programmable version. (Hitachi Ltd, New Marunouchi Building No 5, 1-chome Marunouchi, Tokyo, Japan. Hitachi Electronic Components (UK) Ltd, Hitec House, 221-225 Station Road, Harrow, Middx HA7 2XI_, UK. Tel: 01-861
Recent moves to 1 Mbit dynamic RAMs have prompted Advanced Micro Devices (AMD) to introduce an 11-bit-wide dynamic memory drivers designed to increase efficiency beyond that offered by 8-bit and 9bit devices. The increased drive capacity of the Am2976's 11 drivers will enable designers to reduce substantially the system part count and hence system costs, according to the manufacturer. It also allows all memory array RAS and CAS lines to be driven by one chip, minimizing skew times between devices. The Am2976 can drive up to 88 dynamic RAMs with densities up to 1 Mbit, says AMD, typically for applications in mainframes and superminicomputers. Packaging options for the Am2976 include 0.3 in (7.6 mm) plastic and ceramic DIPs PLCCs and LCCs. (Advanced Micro Devices Inc, 901 Thompson Place, Sunnyvale, CA 94086, USA. Advanced Micro Devices (UK) Ltd, AMD House, Goldsworth Road, Wokin& Surrey GU21 1JT, UK. Tel: (04862) 22121) []
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VME-STE net cards Networking cards for use in VME-STE multicomputing systems have been made by GMT Electronics of the UK. The 'VME Networking Card' which has been designed for compatibility with GMT's STE System 1000 network controller, allows data communication over a shared medium with up to 254 nodes connected in a logical ring. Based on the WD2840 LSI communications chip, the VME cards use Manchester encoding and decoding and have an RS422 interface providing a minimum twowire connection. The Manchester signals are alternatively available for use with custom designed interfaces. Access to the STE controller's 16 on-chip registers is via a selectableaddress I/O interface; the VME card decodes the short I/O address range with selectable privilege. On-card dual-port static RAM provides for message passing between the VME card and the controller. The
vol 10 no 4 may 1986
GMT's VME Network Card (foreground) links to the STE System 1000 network controller contiguous block resides on a jumper-selectable address boundary; the VME card decodes the standard address range with selectable privilege and data type. The STE controller interrupt can be connected to the system bus and obeys the relevant protocol on both the VME and STE cards (vectored and nonvectored respectively). (GMT Electronic Systems Ltd, Woodlands Road, Epsom, Surrey KT18 7HN, UK. Tel: (03727) 42333) []
Microprogram sequencers
Microprogram sequencers in "CEMOS II" have been added to IDT's Microslice range 12-bit and 16-bit CMOS microprogram sequencers with 16 control functions have been introduced by US-based Integrated Device Technology (IDT) as part of its Microslice microprocessor range. The IDT39CIOB and IDT49C410 have 12-bit and 16-bit loop control counters, respectively, and provide control of up to 4k and 64k words of microprogram memory. Addresses are selected from one of four sources: the microprogram address register, external direct input, internal register-counter or a 33-deep LIFO (last-in-first-out) stack. The LIFO provides for subroutine return linkage and looping capabilities for highly nested microcode applications, says IDT. The devices have been designed for speed, drive and instruction compatibility with the 2910A bipolar sequencer, but for lower power consumption. Packaging is in 44-pin LCCs or 40-pin DIPs (39CIOB) and 48pin LCCs, DIPs or 'shrink-DIPs' (49C410). (Integrated Device Technology Inc, 3236 Scott Bird, PO Box 58015, Santa Clara, CA 950528015, USA. Tel: (408) 727-6716. Integrated Device Technology (Europe) Ltd, 5 Bridge Street, Leatherhead, Surrey KT22 8BL, UK. Tel: (0372) 377375) []
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11-bit memory driver
Hitachi has produced a CMOS microcomputer which it claims to be the first 8-bit single-chip ZTAT (zero turnaround time) computer with an on-chip A/D converter. The HD63705Z has 68 parallel I/O ports, a serial communications interface, eight channel × 8 bit A/D converter and a slave processor mode allowing its use as an intelligent peripheral. On-chip memory consists of 8 kbyte of EPROM and 384 byte of RAM. The chip has five 16-bit timers and a software programmable pulsewidth-modulation timer. Packaging is in a flat pack either with a window for EPROM programming or as a windowless one-time-programmable version. (Hitachi Ltd, New Marunouchi Building No 5, 1-chome Marunouchi, Tokyo, Japan. Hitachi Electronic Components (UK) Ltd, Hitec House, 221-225 Station Road, Harrow, Middx HA7 2XI_, UK. Tel: 01-861
Recent moves to 1 Mbit dynamic RAMs have prompted Advanced Micro Devices (AMD) to introduce an 11-bit-wide dynamic memory drivers designed to increase efficiency beyond that offered by 8-bit and 9bit devices. The increased drive capacity of the Am2976's 11 drivers will enable designers to reduce substantially the system part count and hence system costs, according to the manufacturer. It also allows all memory array RAS and CAS lines to be driven by one chip, minimizing skew times between devices. The Am2976 can drive up to 88 dynamic RAMs with densities up to 1 Mbit, says AMD, typically for applications in mainframes and superminicomputers. Packaging options for the Am2976 include 0.3 in (7.6 mm) plastic and ceramic DIPs PLCCs and LCCs. (Advanced Micro Devices Inc, 901 Thompson Place, Sunnyvale, CA 94086, USA. Advanced Micro Devices (UK) Ltd, AMD House, Goldsworth Road, Wokin& Surrey GU21 1JT, UK. Tel: (04862) 22121) []
1414)
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VME-STE net cards Networking cards for use in VME-STE multicomputing systems have been made by GMT Electronics of the UK. The 'VME Networking Card' which has been designed for compatibility with GMT's STE System 1000 network controller, allows data communication over a shared medium with up to 254 nodes connected in a logical ring. Based on the WD2840 LSI communications chip, the VME cards use Manchester encoding and decoding and have an RS422 interface providing a minimum twowire connection. The Manchester signals are alternatively available for use with custom designed interfaces. Access to the STE controller's 16 on-chip registers is via a selectableaddress I/O interface; the VME card decodes the short I/O address range with selectable privilege. On-card dual-port static RAM provides for message passing between the VME card and the controller. The
vol 10 no 4 may 1986
GMT's VME Network Card (foreground) links to the STE System 1000 network controller contiguous block resides on a jumper-selectable address boundary; the VME card decodes the standard address range with selectable privilege and data type. The STE controller interrupt can be connected to the system bus and obeys the relevant protocol on both the VME and STE cards (vectored and nonvectored respectively). (GMT Electronic Systems Ltd, Woodlands Road, Epsom, Surrey KT18 7HN, UK. Tel: (03727) 42333) []
Microprogram sequencers
Microprogram sequencers in "CEMOS II" have been added to IDT's Microslice range 12-bit and 16-bit CMOS microprogram sequencers with 16 control functions have been introduced by US-based Integrated Device Technology (IDT) as part of its Microslice microprocessor range. The IDT39CIOB and IDT49C410 have 12-bit and 16-bit loop control counters, respectively, and provide control of up to 4k and 64k words of microprogram memory. Addresses are selected from one of four sources: the microprogram address register, external direct input, internal register-counter or a 33-deep LIFO (last-in-first-out) stack. The LIFO provides for subroutine return linkage and looping capabilities for highly nested microcode applications, says IDT. The devices have been designed for speed, drive and instruction compatibility with the 2910A bipolar sequencer, but for lower power consumption. Packaging is in 44-pin LCCs or 40-pin DIPs (39CIOB) and 48pin LCCs, DIPs or 'shrink-DIPs' (49C410). (Integrated Device Technology Inc, 3236 Scott Bird, PO Box 58015, Santa Clara, CA 950528015, USA. Tel: (408) 727-6716. Integrated Device Technology (Europe) Ltd, 5 Bridge Street, Leatherhead, Surrey KT22 8BL, UK. Tel: (0372) 377375) []
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