SC2200 NSC [National Semiconductor], SC2200 Datasheet - Page 307

• Manufacturer Part Number: SC2200
• Description: Thin Client On a Chip
• Manufacturer: NSC [National Semiconductor]

Revision 3.0
Core Logic Module
I/O Port 040h
Write
Read
I/O Port 041h
Write
Read
7:0
5:4
3:1
7:0
5:4
3:1
Bit
7
6
0
7
6
0
Description
Counter Value.
Counter Output. State of counter output signal.
Counter Loaded. Indicates if the last count written is loaded.
0: Yes.
1: No.
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.
Current Counter Mode. 0-5.
BCD Mode.
0: Binary.
1: BCD (Binary Coded Decimal).
Counter Value.
Counter Output. State of counter output signal.
Counter Loaded. Indicates if the last count written is loaded.
0: Yes.
1: No.
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.
Current Counter Mode. 0-5.
BCD Mode.
0: Binary.
1: BCD (Binary Coded Decimal).
(Continued)
Table 5-45. Programmable Interval Timer Registers
PIT Timer 1 Counter (Refresh)
PIT Timer 1 Status (Refresh)
PIT Timer 0 Counter
PIT Timer 0 Status
307
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