cs5535 National Semiconductor Corporation, cs5535 Datasheet - Page 328

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

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PIT Register Descriptions
5.8.2.6
I/O Address
Type
Reset Value
I/O Address 43h[7:0] = 11011xx0 or 1000xxxx
I/O Address 43h[7:0] = 11101xx0
I/O Address 43h[7:0] = 11011xx0 or 1000xxxx
I/O Address 43h[7:0] = 11101xx0
CNTR2_OUT
Bit
7:0
Bit
7:0
5:4
3:1
7
6
0
7
PIT Timer 2 Status - Speaker (PIT_TMR2_STS_SPKR)
Name
CNTR2
Name
CNTR2_CUR_
COUNT
CNTR2_OUT
CNTR2_LOAD
CNTR2_RW
CNTR2_MODE
BCD
CNTR2_LOAD
42h
R
00h
6
Description
Counter 2 Value. Provides the base counter value.
Description
Counter 2 Current Count. Reports the current count value in Counter 2.
Counter 2 Output. Returns current state of counter output signal.
Counter 2 Loaded. Last count written is loaded?
0: Yes.
1: No.
Counter 2 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 2 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).
PIT_TMR2_CNTR_SPKR Bit Description
(Continued)
5
PIT_TMR2_STS_SPKR Bit Descriptions
PIT_TMR2_STS_SPKR Register Map
CNTR2_RW
CNTR2_CUR_COUNT
4
328
3
CNTR2_MODE
2
1
BCD
Revision 0.8
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