em78f644nso28s ELAN Microelectronics Corp, em78f644nso28s Datasheet - Page 27

• 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)
6.1.7 Bank 0 R6 (PORT6)
Bit 7 ~ 0 (P67 ~ P60): 8-bit Port6 I/O data register
You can use IOC6 register to define each bit as input or output.
6.1.8 Bank 0 R7 (PORT7)
Bits 7 ~ 2 (P77 ~ P72): 6-bit Port7 I/O data register
Bits 1 ~ 0:
User can use IOC7 register to define each bit as input or output.
6.1.9 Bank 0 R8 (PORT8)
Bit 3 ~ 0 (P83 ~ P80): 4-bit Port8 I/O data register
User can use IOC8 register to define each bit as input or output.
6.1.10 Bank 0 R9 (TBLP: Table Point Register for Instruction
Bits 7 ~ 0: This is the least 8 significant bits of address for program code.
RBit7
Bit 7
Bit 7
Bit 7
Bit 7
P67
P77
-
For F642/542N, Bit 6 & Bit 5, Bit 3 ~ Bit 0 are unused. Set to “0” all the time.
For F641/541N, Bit 7 ~ Bit 0 are unused. Set to “0” all the time.
Bank 0 R9 overflow will carry to Bank 3 R6.
Bank 0 R9 underflow will borrow from Bank 3 R6.
RBit6
Bit 6
Bit 6
Bit 6
Bit 6
For F641/541N, Bit 7 & Bit 6 are unused. Set to “0” all the time.
P66
P76
-
For F644/544N, Bit 3 is unused. Set to “0” all the time.
Not used, set to “0” all the time.
RBit5
Bit 5
Bit 5
Bit 5
TBRD)
Bit 5
P65
P75
-
EM78F648/644/642/641/548/544/542/541N
RBit4
Bit 4
Bit 4
Bit 4
Bit 4
P64
P74
-
NOTE
NOTE
NOTE
NOTE
RBit3
Bit 3
Bit 3
Bit 3
Bit 3
P63
P73
P83
RBit2
Bit 2
Bit 2
Bit 2
Bit 2
P62
P72
P82
8-Bit Microcontroller
RBit1
Bit 1
Bit 1
Bit 1
Bit 1
P61
P81
-
RBit0
Bit 0
Bit 0
Bit 0
Bit 0
P60
P80
-
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