EM78P510N
8-Bit Microcontrollers
Figure 6-4 TCC/WDT Block Diagram
6.4 I/O Port
Registers for I/O Circuit
R_BANK Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Bank 4
Bank 5
Bank 6
0X07~0X0C PIOCR IOC7
IOC6
R/W
PH6
R/W
OD6
R/W
IOC5
R/W
PH5
R/W
OD5
R/W
IOC4
R/W
PH4
R/W
OD4
R/W
IOC3
R/W
PH3
R/W
OD3
R/W
IOC2
R/W
PH2
R/W
OD2
R/W
IOC1
R/W
PH1
R/W
OD1
R/W
IOC0
R/W
PH0
R/W
OD0
R/W
R/W
0X07~0X0C PHCR
PH7
R/W
0X07~0X0B ODCR OD7
R/W
The I/O registers, (Port 7, Port 8, Port 9, Port A, Port B and Port C), are bidirectional
tri-state I/O ports. All pins are pulled-high internally by software. Likewise, Port 7, Port
8, Port 9, Port A, Port B and Port C, can have open-drain output also through software.
Port 7 [7:4], Port B [3:0] and Port 8 [3:2] provides an input status changed interrupt (or
wake-up) function and is pulled-high by software. Each I/O pin can be defined as
"input" or "output" pin by the I/O control register Bank 4 R7 ~ RC. The I/O registers and
I/O control registers are both readable and writeable. The I/O interface circuits are
shown in Fig. 6-5.
The I/O cannot be set to pull-high and output low at the same time. It can relatively
increase the power consumption.
Product Specification (V0.9) 09.12.2006
(This specification is subject to change without further notice)
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ELAN [ ELAN MICROELECTRONICS CORP ]
