EM78F651NAM datasheet(22/58 Pages) EMC

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EM78F651N

8-Bit Microcontroller

•

Product Specification (V1.1) 10.20.2006

(This specification is subject to change without further notice)

( IOCC1)

PSW0~PSW2

PST2~PST

Fig. 6-3 Block Diagram of TCC and WDT

Table 5 Internal RC Drift Rate (Ta=25

°C, VDD=2.3V~5.5 V, VSS=0V)

Drift Rate

Internal RC

Temperature

(-40

°C~85°C)

Voltage

Process

Total

16.5 ms

± 3%

± 5%

±8%

18 ms

± 3%

± 5%

± 8%

6.4 I/O Ports

The I/O registers, Port 5, Port 6 and Port 7, are bidirectional tri-state I/O ports. Port 6

can be pulled high internally by software. In addition, Port 6 can also have open-

drain output by software. Input status change interrupt (or wake-up) function on Port 6

P50 ~ P53 and P60 ~ P63 pins can be pulled down by software. Each I/O pin can be

defined as "input" or "output" pin by the I/O control register (IOC5 ~ IOC7). When Port

7.0 is set as output, the internal circuit becomes open-drain, so it must be tied to pull-

high to work normally.

The I/O registers and I/O control registers are both readable and writable. The I/O

interface circuits for Port 5, Port 6 and Port 7 are shown in the following Figures 6-4,

6-5 (a), 6-5 (b), and Figure 6-6.

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