VT82C596 データシートの表示（PDF） - Unspecified
部品番号
コンポーネント説明
一致するリスト
VT82C596 Datasheet PDF : 96 Pages
| |||
:H &RQQHFW 7HFKQRORJLHV ,QF
VT82C596B
Signal Name
RTCX1
RTCX2
RTCCS# / GPO24
RTCAS / GPO25
Pin #
N19
R20
M2
L1
Internal Real Time Clock
I/O Signal Description
I RTC Crystal Input: 32.768 KHz crystal or oscillator input.
O RTC Crystal Output: 32.768 KHz crystal output
O MultiFunction Pin
External RTC Chip Select. (Rx76[0] = 0) Asserted for read or write accesses to
RTC port 71h. Externally connected to a pair of OR gates (to logically AND
the chip select with IOR# and IOW#) to generate the active-low RTC read and
write commands.
General Purpose Output 24. (Rx76[0] = 1) General purpose output.
O MultiFunction Pin
External RTC Address Strobe. (Rx76[1] = 0) Asserted for writes to RTC I/O
Port 70h.
General Purpose Output 25. (Rx76[1] = 1) General purpose output.
Signal Name
KEYLOCK / PIRQ1
KBCK / NC
KBDT / NC
MSCK / A20GATE
MSDT / KBCS# / GPO26
Pin #
J4
N3
M5
P1
K1
Internal Keyboard Controller
I/O Signal Description
I Extended Function (PIIX4 PIRQ1)
Rx59[1]=1
Key Lock. Input to internal keyboard controller
IO Extended Function (PIIX4 No Connect)
Rx5A[0]=1 (Internal keyboard controller enabled –strapped from XD0)
Keyboard Clock
IO Extended Function (PIIX4 No Connect)
Rx5A[0]=1 (Internal keyboard controller enabled –strapped from XD0)
Keyboard Data
IO MultiFunction Pin
Rx5A[1]=0 (internal keyboard controller disabled – strapped from XD1)
Gate A20. From optional external keyboard controller
Rx5A[1]=1 (internal keyboard controller enabled –strapped from XD1)
Mouse Clock. Mouse clock (extended function not available on PIIX4)
IO MultiFunction Pin
Rx5A[1]=0 (Internal keyboard controller disabled –strapped from XD1)
Keyboard Controller Chip Select. (Rx76[2]=0 external keyboard controller
enabled) Chip select for external keyboard controller.
General Purpose Output 26 (Rx76[2]=1 external keyboard controller
disabled) General purpose output
Rx5A[1]=1 (Internal keyboard controller enabled –strapped from XD1)
Mouse Data. Mouse data (extended function not available on PIIX4)
Revision 0.3 June 17, 1999
-14-
Pinouts
Share Link: 