EM78P468NBQSSLASHNBQJ datasheet(22/82 Pages) EMC

22 / 82 page

EM78P468N/L

8-Bit Microcontroller

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Product Specification (V1.6) 12.31.2007

(This specification is subject to change without further notice)

6.2.3 IOC60/P6CR (Port 6 I/O Control Register)

(Address: 06h, Bit 0 of R5 = “0”)

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

IOC67

IOC66

IOC65

IOC64

IOC63

IOC62

IOC61

IOC60

Bit 7 (IOC67) ~ Bit 0(IOC60):

Port 6 I/O direction control register

IOC6x =”0”:

set the relative Port 6.x I/O pins as output

IOC6x =”1”:

set the relative Port 6.x I/O pin into high impedance (input pin)

6.2.4 IOC70/P7CR (Port 7 I/O Control Register)

(Address: 07h, Bit 0 of R5 = “0”)

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

IOC77

IOC76

IOC75

IOC74

IOC73

IOC72

IOC71

IOC70

Bit 7 (IOC77) ~ Bit 0 (IOC70):

Port 7 I/O direction control register

IOC7x = “0”:

set the relative Port 7.x I/O pins as output

IOC7x = “1”:

set the relative Port 7.x I/O pin into high impedance (input pin)

6.2.5 IOC80/P8CR (Port 8 I/O Control Register)

(Address: 08h, Bit 0 of R5 = “0”)

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

IOC87

IOC86

IOC85

IOC84

IOC83

IOC82

IOC81

IOC80

Bit 7 (IOC 87) ~ Bit 0 (IOC 80):

Port 8 I/O direction control register

IOC8x = “0”:

set the relative Port 8.x I/O pins as output

IOC8x = “1”:

set the relative Port 8.x I/O pin into high impedance (input pin)

6.2.6 IOC90/RAM_ADDR (128 Bytes RAM Address)

(Address: 09h, Bit 0 of R5 = “0”)

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

RAM_A6

RAM_A5

RAM_A4

RAM_A3

RAM_A2

RAM_A1

RAM_A0

Bit 7:

Not used, fixed at “0”

Bits 6~0:

128 bytes RAM address

6.2.7 IOCA0/RAM_DB (128 Bytes RAM Data Buffer)

(Address: 0Ah, Bit 0 of R5 = “0”)

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

RAM_D7

RAM_D6

RAM_D5

RAM_D4

RAM_D3

RAM_D2

RAM_D1

RAM_D0

Bits 7~0:

128 bytes RAM data transfer register

EM78P468NBQS/NBQJ 数据表(PDF) 22 Page - ELAN Microelectronics Corp

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