EM78P447N

8-Bit Microcontroller with OTP ROM

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

 

0

 

0

 

0

 

1:2

 

0

 

0

 

1

 

1:4

 

0

 

1

 

0

 

1:8

 

0

 

1

 

1

 

1:16

 

1

 

0

 

0

 

1:32

 

1

 

0

 

1

 

1:64

 

1

 

1

 

0

 

1:128

 

1

 

1

 

1

 

1:256

 

WDT Rate

1:1

1:2

1:4

1:8

1:16

1:32

1:64

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.

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.

12

Product Specification (V1.1) 03.30.2005

(This specification is subject to change without further notice)

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IBM EM78P447N manual 3 IOC5 ~ IOC7 I/O Port Control Register, Iocb Wake-up Control Register for Port6, TCC Rate, WDT Rate