EM78P468LAQ EMC [ELAN Microelectronics Corp], EM78P468LAQ Datasheet - Page 29

• Manufacturer Part Number: EM78P468LAQ
• Description: 8-BIT Microcontroller
• Manufacturer: EMC [ELAN Microelectronics Corp]

Product Specification (V1.0) 03.15.2006
(This specification is subject to change without further notice)
4.2.16 IOC91/CNT12CR (Counter 1, 2 Control Register)
Bit 2 ~ 0 (WDTP2 ~ WDTP0) : watchdog timer pre-scaler bits. The WDT source clock is
sub-oscillation frequency.
Bit 7(CNT2S): Counter 2 clock source select 0/1 => Fs/ Fm*
(*Fs: sub-oscillator clock, Fm: main-oscillator clock)
Bit 6~4(CNT2P2 ~ CNT2P 0): Counter 2 pre-scaler select bits
Bit 3(CNT1S): Counter 1 clock source select 0/1 => Fs/ Fm*
Bit 2~0 (CNT1P2 ~ CNT1P20): Counter 1 pre-scaler select bits
CNT2S
Bit 7
CNT2P2
CNT1P2
(Address: 09h, Bit 0 of R5 = “1”)
WDTP2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
CNT2P2 CNT2P1 CNT2P0
Bit 6
CNT2P1
CNT1P1
Bit 5
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
WDTP1
0
0
1
1
0
0
1
1
Bit 4
CNT1P0
CNT1P0
CNT1S
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Bit 3
WDTP0
0
1
0
1
0
1
0
1
CNT1P2 CNT1P1 CNT1P0
Counter 2 scale
Counter 1 scale
Bit 2
1:2
1:4
1:8
1:16
1:32
1:64
1:128
1:256
1:2
1:4
1:8
1:16
1:32
1:64
1:128
1:256
8-BIT Microcontroller
Bit 1
WDT rate
1:128
EM78P468L
1:16
1:32
1:64
1:1
1:2
1:4
1:8
Bit 0
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