vt82c586a ETC-unknow, vt82c586a Datasheet - Page 33

• Manufacturer Part Number: vt82c586a
• Description: Integrated Peripheral Controller
• Manufacturer: ETC-unknow

Offset 88 - Timer Control 1 .............................................. RW
Offset 89 - Timer Control 2 .............................................. RW
Offset 8A - Timer Control 3 ............................................. RW
Offset 8B - GP Timer Reload Enable .............................. RW
Preliminary Revision 0.1 October 13, 1996
5-4
1-0
7-0
7-0
7-5
7
6
3
2
4
3
2
1
0
GP1 Timer Enable .................................... default=0
GP1 Timer Auto Reload After Count to 0 .... def=0
GP1 Timer Select / Enable
GP0 Timer Enable .................................... default=0
GP0 Timer Auto Reload After Count to 0 .... def=0
GP0 Timer Select / Enable
GP0 Timer Load Value ............................. default=0
GP1 Timer Load Value ............................. default=0
Reserved
The following bits all default to 0 on power up:
GP0 Timer Enable Reload on Primary Activity
GP1 Timer Enable Reload on HDD/Floppy Access
GP1 Timer Enable Reload on Video Access
GP1 Timer Enable Reload on Serial Port Access
GP1 Timer Enable Reload on KBC Access

00 Disable ...................................................default
01 Time base = 10 msec
10 Time base = 1 second
11 Time base = 1 minute
00 Disable ...................................................default
01 Time base = 10 msec
10 Time base = 1 second
11 Time base = 1 minute
........................................ always reads 0
-27-
Offset 8C - Conserve Mode / Secondary Event .............. RW
Offset 8D - Miscellaneous Control .................................. RW
Offset 8E - STPCLK# Duty Cycle ................................... RW
7-6
3-2
7-4
3-0
5
4
1
0
7
6
5
4
3
2
1
0
Conserve Mode Clock Select
Conserve Mode Indicator ........................ RO, def=0
Conserve Mode Enable ............................. default=0
Secondary Event Activity Timer
Secondary Event Indicator ...................... RO, def=0
Secondary Activity Enable ....................... default=0
Reserved (do not program) ....................... default=0
Wait for STPCLK Acknowledge .............. default=0
Wait for HALT Before STPCLK# Asserted .def=0
STPCLK# Throttling Time Base
STPCLK# Throttling Enable ...................default=0
Suspend Mode Enable
Reserved (do not program) .......................default=0
Global SMI Enable ....................................default=0
Reserved
STPCLK# Duty Cycle
0000 Disable................................................... default
0001 1/16
0010 2/16
0011 3/16
1111 15/16
00 1/16 second............................................ default
01 1/8 second
10 1 second
11 1 minute
00 4 msec.................................................... default
01 128 msec
10 1 second
11 By EOI + 0.5 ms
... ...
0
1
0
1
32 us .................................................... default
1 ms
Normal Operating Mode........................ default
Put CPU into Suspend Mode
........................................ always reads 0
Register Descriptions
VT82C586A