Systems, circuits and methods for mixed voltages and programmabl

Details Systems, circuits and methods for mixed voltages and programmabl Systems, circuits and methods for mixed voltages and programmabl

1994-12-22

1999-02-09

An, Meng-Ai T.

G06F 100

Patent

active

058706178

ABSTRACT:
An integrated circuit (110) includes, on a single chip, distinct supply voltage terminals and internal on-chip supply conductors connected respectively thereto, including a ground terminal (GND) and terminals for first and second supply voltages (VCC3, VCC5), and a terminal for a selectable supply voltage (VCCDK) and also has a power-good terminal (PWRGOOD5). A plurality of peripheral control circuits (910, 938, 932) are connected by an on-chip internal bus (904). The peripheral control circuits (910, 938, 932) connect to different ones of the internal on-chip supply conductors for operation on the first and second supply voltages (VCC3, VCC5), and the selectable supply voltage (VCCDK). Reset circuitry (2390) is provided for at least one of the peripheral control circuits. A control latch (PMU.sub.-- CNTRL) has a bit (VCCDRV5V) to which the reset circuitry (2390) is responsive. The reset circuitry (2390) provides resets for the at least one of the peripheral control circuits (IDERST, FDDRST) as a function of a voltage at the power-good terminal (PWRGOOD5). Other devices, systems and methods are also disclosed.

REFERENCES:
patent: 3968478 (1976-07-01), Mensch, Jr.
patent: 5021679 (1991-06-01), Fairbanks et al.
patent: 5300824 (1994-04-01), Iyengar
patent: 5329491 (1994-07-01), Brown et al.
patent: 5345392 (1994-09-01), Miro et al.
patent: 5363335 (1994-11-01), Jungroth et al.
patent: 5396635 (1995-03-01), Fung
patent: 5412308 (1995-05-01), Brown
patent: 5422523 (1995-06-01), Roberts et al.
patent: 5483486 (1996-01-01), Javanifard et al.
patent: 5508653 (1996-04-01), Chu et al.
patent: 5534801 (1996-07-01), Wu et al.
patent: 5559966 (1996-09-01), Cho et al.
Linley Gwennap, Microprocessor Report, "TI Shows Integrated X86 CPU for Notebooks", vol. 8, No. 2. FEb. 14, 1994, pp. 5-7.
PicoPower "Evergreen HV" PT86C268, 486/386DX Core Lights Chip, Preliminary Data Book, Ver. 1.0.2, Mar. 9, 1993, pp. i-iii, 7, 8, 38.
PicoPower Redwood, Technical Reference Manual, Databook 3.0P, Jul. 8, 1994, pp. i-iv, 13-15, 22.
PicoPower "Evergreen" 486/386DX Portable Computer Core Chip, Version 1.3.1, Sep. 16, 1992, pp. i-iv, 8,9, 34.
Intel486 SL Microprocessor SuperSet System Design Guide, System and Power Management, Chapter 12, 1992, pp. 12-1--12-38.
Intel386 SL Microprocessor SuperSet System Design Guide, System and Power Management, Chapter 14, 1992, pp. 14-1--14-28.
Intel386 SL Microprocessor SuperSet Programmer's Reference Manual, System and Power Management, Chapter 6, 1992, pp. 6-1--6-56.
OPTi, 82C802G, System/Power Management Controller, Mar. 1994, pp. 1-14, 18.
82C836 ChipSet, Single-Chip 386SX at Data Book, Dec. 1990, pp. 1-6, 11, 91, 114, 115.
Intel386 SL Microprocessor SuperSet System Design Guide, 386 SL CPU to 82360 SL Interface, 1992, Chapter 3, pp. 31---3-11.
Intel486 SL Microprocessor SuperSet System Design Guide, 486 SL CPU to 82360 SL Interface, 1992 Chapter 3, pp. 3-1--3-12.
OPTi Python Chipset for Pentium Processors, 82C546 & 82C547 Data Book Version 1.0, May 1994, pp. 1-3,33-35.
Symphony Laboratories, Wagner 486 PC/AT Chip Set, Rev A.2, Feature, Block Diagram, pp. 1-1--1-2.
UMC Super Energy Star Green File, Version 4.0, Preliminary UM8881F/8886F Apr. 15, 1994, pp. 1-3, 16.
OPTi, Viper Notebook Chipset, 82C556/82C557/82C558N, Version 0.2, 1994, pp. 1-5, 45.
Texas Instruments, TACT83000 AT Chip Set, PC Systems Logic, 1991. pp. 2-50.
OPTi 82C596/82C597, Cobra Chipset for Pentium Processors, Data Book Rev. 1.0, Oct. 1994, pp. 1-3,32.
EFAR, EC802G, One Chip 32 Bits PC/AT Core Logic, Technical Reference Manual, 1994, pp. 11-14, 25,96.
ETEQ Micro, Buffalo ET9000 486 Write Back Cache "AT" Single Chip, Rev.03, May 1994, pp. 1-3.
ETEQ Micro, Panda 82C390SX Single Chip 386 SX Direct Mapped Cache Solution, Rev.01, Oct. 1991, pp. 1-3.

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