CS5535-UDCF AMD (ADVANCED MICRO DEVICES), CS5535-UDCF Datasheet - Page 365

• 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

Keyboard Emulation Logic Register Descriptions
6.10.1
6.10.1.1 Keyboard Emulation Logic Control Register (KELX_CTL)
MSR Address
Type
Reset Value
Port A operation is not effected by Snoop or EmulationEnable settings in KELX_CTL. Bits [31:5] are Reserved. Writes are
“don’t care” and reads always return zero.
AMD Geode™ CS5535 Companion Device Data Book
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
31:5
Bit
3:2
4
1
0
KEL Specific MSRs
Name
RSVD
PRTA_EN
SOFEVENT
EER
SNOOP
5140001Fh
R/W
00000010h
Description
Reserved. Writes have no effect; reads return 0.
Port A Enable. Defaults high. If high, Port A is enabled and accesses to I/O Port 092h
are processed by the Geode CS5535 companion device. If low, accesses to I/O Port
092h are passed on to the LPC bus (where Port A may exist inside a SuperI/O).
Start-Of-Frame (SOF) Event (SOFEVENT) Selection.
00: Test Mode (No delays).
01: USB1 (Default).
10: USB2.
11: 1 ms from PIT.
Emulation Event (EE) Routing.
0: Emulation Interrupt and ASMI.
1: ASMI only.
The EER bit controls keyboard emulation interrupt generation associated with EEs:
• Character Pending - Clear EE by setting the Outputfull bit in the HCE_Status register
• Input Full - Clear EE by clearing the InputFull bit in HCE_Status.
• External IRQ - Clear EE by clearing IRQ1Active or IRQ12Active as appropriate in
Snoop. Only applies when EmulationEnable in HCE_Control is low. When high, indi-
cates A20 and Init keyboard sequences are to be detected on I/O Port 060h/064h
transactions to the LPC keyboard. KEL must generate ASMI upon detection of A20 and
Init even though EmulationEnable in HCE_Control is low.
Emulation
Enable Snoop
or clearing the CharacterPending bit in HCE_Control.
HCE_Control.
0
1
0
KELX_CTL Bit Descriptions
KELX_CTL Register Map
1
x
0
RSVD
PORTA_A20_ASMI or KEL_INIT_ASMI is generated when sequence
is detected. Status of ASMI Flag and Enable bits are in DIVIL MSR
51400002h.
PORTA_A20_ASMI or KEL_INIT_ASMI is generated when sequence
is detected. KEL_ASMI is generated on InputFull, External IQ, or
Character Pending. Status of ASMI Flag and Enable bits are in DIVIL
MSR 51400002h For the A20 keyboard sequence, both KEL_ASMI
and PORTA_A20_ASMI are signaled.
OFF.
9
8
31506B
7
6
5
4
3
2
1
365
0