ht82m99e Holtek Semiconductor Inc., ht82m99e Datasheet - Page 21

• Manufacturer Part Number: ht82m99e
• Description: Ht82m99e/ht82m99a -- Usb Mouse Encoder 8-bit Mcu
• Manufacturer: Holtek Semiconductor Inc.

The device with remote wake-up function can wake-up
the USB Host by sending a wake-up pulse through
RMWK (bit 1 of USC). Once the USB Host receive the
wake-up signal from the HT82M99E, it will send a Re-
sume signal to the device. The timing is as follows:
To Configure the HT82M99E as PS2 Device
The HT82M99E can be defined as a USB interface or a
PS2 interface by configuring the SPS2 (bit 4 of the USR)
I/O Port Special Registers Definition
Rev. 2.20
Register Bits
Register Bits
Port-A (12H)
Port-A Control (13H)
This port configure the input or output mode of Port-A
Port-B Control (14H)
(12H)
(14H)
PA
PB
0~1 PB0~PB1
5~6 PB5~PB6
0
1
2
3
4
5
6
7
2
3
4
7
PA
Labels
Labels
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
PB2
PB3
PB4
PB7
PAC
PB
Read/Write Option
Read/Write Option
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
I/O (R/W) has pull-low and pull-high ROM code option.
Has falling edge wake-up ROM code option.
I/O (R/W) has pull-low and pull-high option.
Has falling edge wake-up option.
I/O (R/W) has pull-low and pull-high option.
Has falling edge and rising edge wake-up option.
I/O (R/W) has pull-low and pull-high option.
Has falling edge and rising edge wake-up option.
I/O (R/W) has pull-high option.
Has falling edge wake-up option.
I/O (R/W) has pull-high option.
Has falling edge wake-up option.
I/O (R/W) has pull-high option.
Has falling edge wake-up option.
I/O (R/W) has pull-high option.
Has falling edge wake-up option, pin-shared with timer input pin.
Reserved bit.
I/O (R/W), has pull-low and pull-high option.
I/O (R/W), has pull-low and pull-high option.
I/O (R/W), has pull-high option, can wake-up.
Reserved bit.
I/O (R/W), has pull-high option and has wake-up capability.
21
and SUSB (bit 5 of the USR). If SPS2=1, and SUSB=0,
the HT82M99E is defined as PS2 interface, pin USBD-
is now defined as PS2 Data pin and USBD+ is now de-
fined as PS2 Clk pin. The user can easily read or write to
the PS2 Data or PS2 Clk pin by accessing the corre-
sponding bit PS2DAI (bit 4 of the USC), PS2CKI (bit 5 of
the USC), PS2DAO (bit 6 of the USC) and S2CKO (bit 7
of the USC) respectively.
The user should make sure that in order to read the data
properly, the corresponding output bit must be set to 1 .
For example, if user wants to read the PS2 Data by
reading PS2DAI, the PS2DAO should be set to 1 . Oth-
erwise it always read a 0 .
If SPS2=0, and SUSB=1, the HT82M99E is defined as a
USB interface. Both the USBD- and USBD+ are driven
by the USB SIE of the HT82M99E. User only writes or
reads the USB data through the corresponding FIFO.
Both SPS2 and SUSB default is 0 .
Functions
Functions
HT82M99E/HT82M99A
April 16, 2008