pc87591l National Semiconductor Corporation, pc87591l Datasheet - Page 285

• Manufacturer Part Number: pc87591l
• Description: Lpc Mobile Embedded Controllers
• Manufacturer: National Semiconductor Corporation

Revision 1.07
5.0 Host Controller Interface Modules
Host Interface Mouse Data Out Buffer Register (HIMDO)
The HIMDO register allows the core firmware to write to the DBBOUT register while setting OBF bit in the Status register. If
an IRQ12 interrupt is enabled, it is sent. If the core interrupt on output buffer empty is enabled (OBECIE in HICTRL register
is 1), writing to HIMDO de-asserts it (low).
Location: 00 FEA8
Type: WO
Host Interface Keyboard/Mouse Data In Buffer Register (HIKMDI)
The HIKMDI register allows the core firmware to read to the DBBIN register while clearing IBF bit in the Status register. If
the core interrupt on IBF is enabled (IBFCIE in HICTRL register is 1). Reading from HIKMDI de-asserts it (low).
Location: 00 FEAA
Type: RO
5.2
The PC87591x implements two PM communication channels, both of which are compliant with ACPI specifications for an
embedded controller interface. The PC87591x may be configured to work in either Private Interface or Shared Interface
mode. The PM interface has two identical channels, which are individually configured and used. If using only one channel,
Shared Interface mode should be used; if using both channels, Private Interface mode may be used.
The description below refers to a single channel. The signals may have the suffix ‘n’ to indicate the channel number, either
1 or 2, where applicable. Registers in the core domain have the prefix HIPMn to indicate the channel number. Host domain
registers are identified by the logical device to which they belong.
Note: When working in PC87570 Compatible mode, only channel 1 may be used.
5.2.1
Bit
Name
Bit
Name
7-0
7-0
Bit
Bit
Two operation modes
— PC87570 Compatible
— Enhanced PM
ACPI embedded controller interface compliant support
— Shared interface
— Private interface
PM channel registers (legacy 62
— Command/Status
— Data
PM interrupt using
— IRQ
— SMI
— SCI
POWER MANAGEMENT (PM) CHANNELS
Features
Mouse DBBOUT Data.
Keyboard/Mouse DBBIN Data.
16
16
7
7
6
6
16
, 66
16
)
5
5
Keyboard/Mouse DBBIN Data
(Continued)
Mouse DBBOUT Data
Description
Description
285
4
4
3
3
2
2
1
1
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