Toshiba H1 Series Manual

A SERVICE OF

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TMP92CZ26A

92CZ26A-117

3.7.1 Port 1 (P10 to P17)

Port1 is an 8-bit general-purpose I/O port. Bits can be individually set as either inputs or

outputs by control register P1CR and function register P1FC.

In addition to functioning as a general-purpose I/O port, port1 can also function as a data

bus (D8 to D15).

Setting the AM1 and AM0 pins as shown below and resetting the device initialize port 1

to the following function pins:

AM1 AM0 Function Setting after reset is released

0

0

1

1

0

1

0

1

Don’t use this setting

Data bus (D8 to D15)

Don’t use this setting

Input port (P10 to P17)

Figure 3.7.1 Port1

P1CR Register

P1FC Register

P1 Register

S

0

1

Selector

S

1

0

Selector

External write enable

D8 to D15

Port read data

D8 to D15

External read enable

P10 to P17

(D8 to D15)