W83L951DG Datasheet, PDF (70/112 Pages) Winbond – Mobile Keyboard and Embedded Controller

W83L951DG/W83L951FG
Bit 6~0: Clock Prescale Number
Write: Prescale Counter Reload.
Read: Current Prescale Counter Value
6.8.1.2 Timer 1 Register (T1) (Default Value: 1111_1111)
Bit 7~0:
Write: Timer 1 Counter Reload.
Read: Current Timer 1 Counter Value
Note: In writing, due to the effect of internal frequency XIN/16, 0~16 system clock error occurs in first
prescale period width.
6.8.1.3 Clock Prescale Number of Timer 2 (PRE2) (Default Value: 0111_1111)
Bit 7: Timer 2 Start Bit
1: Start (Prescale Counter Reload & Start, but Timer 2 Data Keep)
0: Stop
Bit 6~0: Clock Prescale Number
Write: Prescale Counter Reload.
6.8.1.4 Timer 2 Register (T2) (Default Value: 1111_1111)
Bit 7~0:
Write: Timer 2 Reload.
Note: In writing, due to the effect of internal frequency XIN/16, 0~16 system clock error occurs in first
prescale period width.
6.8.1.5 Timer X/Y Mode Register (TM) (Default Value: 0000_0000)
Bit 7: Timer Y Start Bit
Start internal Time Y counter and
1: Enable (Prescale Y & Timer Y Data Keep after Stop)
0: Disable
Bit 6: CNTR1 active edge selection bit
0: Interrupt at falling edge Count at rising edge in event counter mode.
1: Interrupt at rising edge Count at falling edge in event counter mode.
Bit 5-4: Timer Y operating bit
00: Timer mode
The Timer Y can select the count by XIN/16.
01: Pulse output mode (Disable GP83 Function, Pin Direct Force “Output”)
Timer Y counts XIN/16. Whenever the contents of the timer reach “00H”, the signal output from the
CNTR1 pin is inverted. If the CNTR1 active edge selection bit is 0, the pin is “H” after initial. If it is 1,
the pin is ‘L’ after initial. When using a timer in this mode, set the corresponding direction register of
port GP83 to output mode.
10: Event count mode (Disable GP83 Function, Pin Direct Force “Input”)
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