
AMD Geode™ SC2200 Processor Data Book
311
Core Logic Module - ISA Legacy Register Space
32580B
Table 6-45. Programmable Interval Timer Registers
Bit
Description
I/O Port 040h
Write
PIT Timer 0 Counter
7:0
Counter Value.
Read
PIT Timer 0 Status
7
Counter Output.
State of counter output signal.
6
Counter Loaded.
Indicates if the last count written is loaded.
0: Yes.
1: No.
5:4
Current Read/Write Mode.
00: Counter latch command.
01: R/W LSB only.
10: R/W MSB only.
11: R/W LSB, followed by MSB.
3:1
Current Counter Mode.
0-5.
0
BCD Mode.
0: Binary.
1: BCD (Binary Coded Decimal).
I/O Port 041h
Write
PIT Timer 1 Counter (Refresh)
7:0
Counter Value.
Read
PIT Timer 1 Status (Refresh)
7
Counter Output.
State of counter output signal.
6
Counter Loaded.
Indicates if the last count written is loaded.
0: Yes.
1: No.
5:4
Current Read/Write Mode.
00: Counter latch command.
01: R/W LSB only.
10: R/W MSB only.
11: R/W LSB, followed by MSB.
3:1
Current Counter Mode.
0-5.
0
BCD Mode.
0: Binary.
1: BCD (Binary Coded Decimal).
Summary of Contents for Geode SC2200
Page 8: ...8 AMD Geode SC2200 Processor Data Book List of Figures 32580B...
Page 16: ...16 AMD Geode SC2200 Processor Data Book Overview 32580B...
Page 70: ...74 AMD Geode SC2200 Processor Data Book Signal Definitions 32580B...
Page 350: ...366 AMD Geode SC2200 Processor Data Book Debugging and Monitoring 32580B...
Page 422: ...440 AMD Geode SC2200 Processor Data Book Electrical Specifications 32580B...