em78f644nso28s ELAN Microelectronics Corp, em78f644nso28s Datasheet - Page 53

• Manufacturer Part Number: em78f644nso28s
• Description: Flash Series 8-bit Microcontroller
• Manufacturer: ELAN Microelectronics Corp

Product Specification (V1.0) 05.05.2010
(This specification is subject to change without further notice)
Bit 2 ~ Bit 0 (PST 2 ~ PST0): TCC prescaler bits
6.2.3 IOC5 (I/O Port 5 Control Register)
Bit 7 ~ 0 (C57 ~ C50): 8-bit Port5 I/O data register
You can use IOC5 register to define each bit as input or output.
6.2.4 IOC6 (I/O Port 6 Control Register)
Bit 7 ~ 0 (C67 ~ C60): 8-bit Port6 I/O data register
You can use IOC6 register to define each bit as input or output.
Bit 7
Bit 7
C57
C67
For F642/542N, Bit 6, Bit 3 ~ Bit 1 are unused. Set to “0” all the time.
For F641/541N, Bit 6, Bit 3 ~ Bit 1 are unused. Set to “0” all the time.
Bit 6
Bit 6
C56
0: Define I/O pin as output
1: Define I/O pin as high impedance
C66
0: Define I/O pin as output
1: Define I/O pin as high impedance
For F641/541N, Bit 7 ~ Bit 6 are unused. Set to “0” all the time.
PST2
0
0
0
0
1
1
1
1
The CONT register is both readable and writable.
Bit 5
Bit 5
C55
C65
PST1
0
0
1
1
0
0
1
1
EM78F648/644/642/641/548/544/542/541N
PST0
Bit 4
Bit 4
C54
C64
0
1
0
1
0
1
0
1
NOTE
NOTE
NOTE
Bit 3
Bit 3
C53
C63
TCC Rate
1:2
1:4
1:8
1:16
1:32
1:64
1:128
1:256
Bit 2
Bit 2
C52
C62
8-Bit Microcontroller
Bit 1
Bit 1
C51
C61
Bit 0
Bit 0
C50
C60
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