EM78P468LAQ EMC [ELAN Microelectronics Corp], EM78P468LAQ Datasheet - Page 18

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

EM78P468L
8-BIT Microcontroller
14 •
4.1.6
4.1.7
4.1.8
4.1.9
Bits 5 ~ 0 (RSR5 ~ RSR0) : are used to select up to 64 registers (address: 00~3F) in the
indirect addressing mode. If no indirect addressing is used, the RSR can be used as an
8-bit general purposes read/writer register.
Bit 7~4 : 4-bits I/O registers of PORT5
User can use IOC50 register to define input or output each bit.
Bit 3~1 : Not used
Bit 0 (IOCPAGE) : change IOC5 ~ IOCF to another page
Bit 7~0 : 8-bit I/O registers of PORT 6
User can use IOC60 register to define input or output each bit.
Bit 7~0 : 8-bit I/O registers of PORT 7
User can use IOC70 register to define input or output each bit.
Bit 7~0 : 8-bit I/O registers of PORT 8
User can use IOC80 register to define input or output each bit.
Bit 7
Bit 7
Bit 7
Bit 7
R57
R67
R77
R87
IOCPAGE = “0” : Page 0 (select register of IOC 50 to IOC F0)
IOCPAGE = “1” : Page 1 (select register of IOC 61 to IOC E1)
R5/PORT5 (PORT 5 I/O Data and Page of Register Select)
(Address: 05h)
R6/PORT6 (PORT 6 I/O Data Register)
(Address: 06h)
R7/PORT7 (PORT 7 I/O Data Register)
(Address: 07h)
R8/PORT8 (PORT 8 I/O Data Register)
(Address: 08h)
Bit 6
Bit 6
Bit 6
Bit 6
R56
R66
R76
R86
Bit 5
R55
Bit 5
Bit 5
Bit 5
R65
R75
R85
Bit 4
R54
Bit 4
Bit 4
Bit 4
R64
R74
R84
(This specification is subject to change without further notice)
Bit 3
Bit 3
Bit 3
Bit 3
R63
R73
R83
--
Product Specification (V1.0) 03.15.2006
Bit 2
Bit 2
Bit 2
Bit 2
R62
--
R72
R82
Bit 1
Bit 1
Bit 1
Bit 1
R61
--
R71
R81
IOCPAGE
Bit 0
Bit 0
Bit 0
Bit 0
R60
R70
R80