ht82k72e Holtek Semiconductor Inc., ht82k72e Datasheet - Page 25

• Manufacturer Part Number: ht82k72e
• Description: Ht82k72e/ht82k72a -- One Channel Keyboard With R-f Type Mcu
• Manufacturer: Holtek Semiconductor Inc.

Internal Register - PG
The following diagram shows the functions controlled by the PF register.
Note that PG5~PG7 will clear to zero after F/W reads the register
Period Timer Register - PTIMER
This register is used to define the period of the timer which always counts in the Suspend mode. Once the timer is
reached, the MCU will be woken-up by the I/O method. Once the MCU is woken-up by the period timer, the CNT_WK
bit of the wake-up Register is set to 1 .
Rev. 1.00
Bit No.
0~7
Period Timer
Function
Name
R/W
R/W
The time interval, one seconds as a unit.
When <7:0>=0H then the Hardware motion detector will only wake-up the
MCU when it detects mouse movement or when there is a button change
for the mouse mode. For the I/O mode, MCU will only be woken up by a Port
I/O or an INT when <7:0>=0H, otherwise the MCU can be woken up from
the suspend mode by the following conditions:
I/O Port wake-up
RC watchdog is reached when the MCU is configured as RC watchdog
enable OTP option
INT wake-up
Reset
The period of the Period Timer Register is reached.
Internal Register - PG
Period Timer Register
25
Description
HT82K72E/HT82K72A
February 20, 2008