em78p468l ELAN Microelectronics Corp, em78p468l Datasheet - Page 22

• Manufacturer Part Number: em78p468l
• Description: 8-bit Microcontroller
• Manufacturer: ELAN Microelectronics Corp

EM78P468N/EM78P468L
8-Bit Microcontroller
16 •
6.2.3
6.2.4
6.2.5
6.2.6
6.2.7
Bit 7 (IOC67) ~ Bit 0(IOC60): Port 6 I/O direction control register
Bit 7 (IOC77) ~ Bit 0 (IOC70): Port 7 I/O direction control register
Bit 7 (IOC 87) ~ Bit 0 (IOC 80): Port 8 I/O direction control register
Bit 7: Not used, fixed at “0”
Bits 6~0: 128 bytes RAM address
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
(Address: 06h, Bit 0 of R5 = “0”)
(Address: 07h, Bit 0 of R5 = “0”)
(Address: 08h, Bit 0 of R5 = “0”)
(Address: 09h, Bit 0 of R5 = “0”)
(Address: 0Ah, Bit 0 of R5 = “0”)
IOC60/P6CR (Port 6 I/O Control Register)
IOC90/RAM_ADDR (128 Bytes RAM Address)
IOCA0/RAM_DB (128 Bytes RAM Data Buffer)
IOC70/P7CR (Port 7 I/O 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)
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)
IOC80/P8CR (Port 8 I/O 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)
RAM_D6
RAM_A6
IOC66
IOC76
IOC86
Bit 6
Bit 6
Bit 6
Bit 6
Bit 6
RAM_A5
RAM_D5
IOC65
IOC75
IOC85
Bit 5
Bit 5
Bit 5
Bit 5
Bit 5
RAM_D4
RAM_A4
IOC64
IOC74
IOC84
Bit 4
Bit 4
Bit 4
Bit 4
Bit 4
(This specification is subject to change without further notice)
RAM_D3
RAM_A3
IOC63
IOC73
IOC83
Bit 3
Bit 3
Bit 3
Bit 3
Bit 3
Product Specification (V1.5) 02.15.2007
RAM_D2
RAM_A2
IOC62
IOC72
IOC82
Bit 2
Bit 2
Bit 2
Bit 2
Bit 2
RAM_A1
RAM_D1
IOC61
IOC71
IOC81
Bit 1
Bit 1
Bit 1
Bit 1
Bit 1
RAM_A0
RAM_D0
IOC60
IOC70
IOC80
Bit 0
Bit 0
Bit 0
Bit 0
Bit 0