NEC PD750008 - Manual (Page 29)

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CHAPTER 2 PIN FUNCTIONS
CHAPTER 2 PIN FUNCTIONS
2.1 PIN FUNCTIONS OF THE µPD750008
Table 2-1. Digital I/O Port Pins (1/2)
Input/
Also
8 bit Upon
I/O
Pin used Function circuit
output
as
I/O reset
type Note 1
P00 Input INT4 4-bit input port (PORT0). x Input B
P01 I/O SCK For P01 to P03, built-in pull-up resistors F -A
P02 I/O SO/SB0 can be connected by software in units of F -B
P03 I/O SI/SB1 3 bits. M -C
P10 Input INT0 4-bit input port (PORT1). x Input B -C
P11 INT1 Built-in pull-up resistors can be connected
P12 INT2 by software in units of 4 bits. Only the
P13 TI0 P10/INT0 pin is provided with noise
elimination function.
P20 I/O PTO0 4-bit I/O port (PORT2). x Input E-B
P21 PTO1 Built-in pull-up resistors can be connected
P22 PCL by software in units of 4 bits.
P23 BUZ
P30 Note 2 I/O (MD0) Note 3 Programmable 4-bit I/O port (PORT3). x Input E-B
P31 Note 2 (MD1) Note 3 I/O can be specified bit by bit.
P32 Note 2 (MD2) Note 3 Built-in pull-up resistors can be connected
P33 Note 2 (MD3) Note 3 by software in units of 4 bits.
Notes 1. I/O circuits enclosed in circles have a Schmitt-triggered input.
2. An LED can be driven directly.
3. ( ): µPD75P0016
2