CS5535-UDCF AMD (ADVANCED MICRO DEVICES), CS5535-UDCF Datasheet - Page 348

• Manufacturer Part Number: CS5535-UDCF
• Manufacturer: AMD (ADVANCED MICRO DEVICES)

Specifications of CS5535-UDCF

• Operating Temperature (min): 0C
• Operating Temperature (max): 85C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

Note 1. If bits [7:6] = 11: Register functions as Read Status Command
Note 2. If bits [5:4] = 00: Register functions as Counter Latch Command
6.8.2.8
I/O Address
Type
Reset Value
348
Bit
3:1
Bit
7:6
3:2
0
5
4
1
0
7
Bit 5 = Latch Count, Bit 4 = Latch Status, Bit 3 = Select Counter 2, Bit 2 = Select Counter 1, Bit 1 = Select Counter
0, and Bit 0 = Reserved.
Bits [7:6] = Selects Counter, and [3:0] = Don’t care.
Port B Control (PIT_PORTBCTL)
Name
CNTR_MODE
BCD
Name
RSVD
OUT2_STS (RO)
TOGGLE (RO)
RSVD
PIT_CNTR2_
SPKR
PIT_CNTR2_EN
RSVD
61h
R/W
00h
6
31506B
PIT_MODECTL_WORD Bit Descriptions (Continued)
OUT2_STS
Description
Current Counter 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).
Description
Reserved. Read 0. Write “don’t care”.
PIT Counter 2 Out State (Read Only). This bit reflects the current status of the PIT
Counter 2 output (OUT2). Write “don’t care”.
Toggle (Read Only). This bit toggles on every falling edge of Counter 1 output (OUT1).
Write “don’t care”.
Reserved. Read 0. Write “don’t care”.
PIT Counter 2 (Speaker).
0: Forces speaker output to 0.
1: Allows Counter 2 output (OUT2) to pass to the speaker (i.e., the AC_BEEP signal; a
PIT Counter 2 Enable.
0: Sets GATE2 input low.
1: Sets GATE2 input high.
mux option on GPIO1).
5
PIT_PORTBCTL Bit Descriptions
PIT_PORTBCTL Register Map
TOGGLE
4
3
AMD Geode™ CS5535 Companion Device Data Book
Programmable Interval Timer Register Descriptions
RSVD
2
PIT_CNTR2_
SPKR
1
PIT_CNTR2_
EN
0