IBM EM78P447N 사용자 설명서
EM78P447N
8-Bit Microcontroller with OTP ROM
12
•
Product Specification (V1.1) 03.30.2005
(This specification is subject to change without further notice)
Bit 4 (TE)
TCC signal edge
0: increment if the transition from low to high takes place on TCC pin
1: increment if the transition from high to low takes place on TCC pin
Bit 3 (PAB)
Prescaler assignment bit.
0: TCC
1: WDT
Bit 2 (PSR2) ~ Bit 0 (PSR0)
TCC/WDT prescaler bits.
PSR2
PSR1
PSR0
TCC Rate
WDT Rate
0 0 0
1:2
1:1
0 0 1
1:4
1:2
0 1 0
1:8
1:4
0 1 1
1:16
1:8
1 0 0
1:32
1:16
1 0 1
1:64
1:32
1 1 0
1:128
1:64
1 1 1
1:256
1:128
4.2.3 IOC5 ~ IOC7 (I/O Port Control Register)
"1" put the relative I/O pin into high impedance, while "0" defines the relative I/O pin
as output.
as output.
IOC5 and IOC7 registers are both readable and writable.
4.2.4 IOCB (Wake-up Control Register for Port6)
7
6
5
4
3
2
1
0
/WUE7
/WUE6 /WUE5
/WUE4
/WUE3
/WUE2
/WUE1 /WUE0
Bit 7 (/WUE7)
Control bit is used to enable the wake-up function of P67 pin.
Bit 6 (/WUE6)
Control bit is used to enable the wake-up function of P66 pin.
Bit 5 (/WUE5)
Control bit is used to enable the wake-up function of P65 pin.
Bit 4 (/WUE4)
Control bit is used to enable the wake-up function of P64 pin.
Bit 3 (/WUE3)
Control bit is used to enable the wake-up function of P63 pin.
Bit 2 (/WUE2)
Control bit is used to enable the wake-up function of P62 pin.
Bit 1 (/WUE1)
Control bit is used to enable the wake-up function of P61 pin.
Bit 0 (/WUE0)
Control bit is used to enable the wake-up function of P60 pin.
0: Enable internal wake-up.
1: Disable internal wake-up.
IOCB Register is both readable and writable.