em78p468n ELAN Microelectronics Corp, em78p468n Datasheet - Page 22

• Manufacturer Part Number: em78p468n
• Description: 8-bit Microcontroller
• Manufacturer: ELAN Microelectronics Corp

EM78P468N/L
8-Bit Microcontroller
16 •
6.2.3 IOC60/P6CR (Port 6 I/O Control Register)
(Address: 06h, Bit 0 of R5 = “0”)
Bit 7 (IOC67) ~ Bit 0(IOC60): Port 6 I/O direction control register
6.2.4 IOC70/P7CR (Port 7 I/O Control Register)
(Address: 07h, Bit 0 of R5 = “0”)
Bit 7 (IOC77) ~ Bit 0 (IOC70): Port 7 I/O direction control register
6.2.5 IOC80/P8CR (Port 8 I/O Control Register)
Bit 7 (IOC 87) ~ Bit 0 (IOC 80): Port 8 I/O direction control register
6.2.6 IOC90/RAM_ADDR (128 Bytes RAM Address)
(Address: 09h, Bit 0 of R5 = “0”)
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”)
Bits 7~0: 128 bytes RAM data transfer register
RAM_D7
IOC67
IOC77
IOC87
Bit 7
Bit 7
Bit 7
Bit 7
Bit 7
0
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)
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)
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)
(Address: 08h, Bit 0 of R5 = “0”)
RAM_D6
RAM_A6
IOC66
IOC76
IOC86
Bit 6
Bit 6
Bit 6
Bit 6
Bit 6
RAM_D5
RAM_A5
IOC65
IOC75
IOC85
Bit 5
Bit 5
Bit 5
Bit 5
Bit 5
RAM_A4
RAM_D4
IOC64
IOC74
IOC84
Bit 4
Bit 4
Bit 4
Bit 4
Bit 4
(This specification is subject to change without further notice)
RAM_A3
RAM_D3
IOC63
IOC73
IOC83
Bit 3
Bit 3
Bit 3
Bit 3
Bit 3
Product Specification (V1.6) 12.31.2007
RAM_A2
RAM_D2
IOC62
IOC72
IOC82
Bit 2
Bit 2
Bit 2
Bit 2
Bit 2
RAM_D1
RAM_A1
IOC61
IOC71
IOC81
Bit 1
Bit 1
Bit 1
Bit 1
Bit 1
RAM_D0
RAM_A0
IOC60
IOC70
IOC80
Bit 0
Bit 0
Bit 0
Bit 0
Bit 0