cs5535 National Semiconductor Corporation, cs5535 Datasheet - Page 327

• Manufacturer Part Number: cs5535
• Description: Geode Cs5535 Companion Multi-function South Bridge
• Manufacturer: National Semiconductor Corporation

Revision 0.8
PIT Register Descriptions
5.8.2.4
I/O Address
Type
Reset Value
5.8.2.5
I/O Address
Type
Reset Value
I/O Address 43h[7:0] = 1101x1x0 or 0110xxxx
I/O Address 43h[7:0] = 1110x1x0
I/O Address 43h[7:0] = 1101x1x0 or 0110xxxx
I/O Address 43h[7:0] = 1110x1x0
CNTR1_OUT
Bit
7:0
5:4
3:1
7
6
0
7
7
PIT Timer 1 Status - Refresh (PIT_TMR1_STS_RFSH)
PIT Timer 2 Counter - Speaker (PIT_TMR2_CNTR_SPKR)
Name
CNTR1_CUR_
COUNT
CNTR1_OUT
CNTR1_LOAD
CNTR1_RW
CNTR1_MODE
BCD
CNTR1_LOAD
41h
R
00h
42h
W
00h
6
6
Description
Counter 1 Current Count. Reports the current count value in Counter 1.
Counter 1 Output. Returns current state of counter output signal.
Counter 1 Loaded. Last count written is loaded?
0: Yes.
1: No.
Counter 1 Read /Write Mode.
00: Counter latch command.
01: R/W LSB only.
10: R/W MSB only.
11: R/W LSB, followed by MSB.
Counter 1 Current Mode.
000: Interrupt on terminal count.
001: Programmable one-shot.
010, 110: Rate generator.
011, 111: Square wave generator.
100: Software triggered pulse generator.
101: Hardware triggered pulse generator.
BCD Mode.
0: Binary.
1: BCD (binary coded decimal).
(Continued)
5
5
PIT_TMR1_STS_RFSH Bit Descriptions
PIT_TMR2_CNTR_SPKR Register Map
PIT_TMR1_STS_RFSH Register Map
CNTR1_RW
CNTR1_CUR_COUNT
4
4
CNTR2
327
3
3
CNTR1_MODE
2
2
1
1
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BCD
0
0