upd75212a Renesas Electronics Corporation., upd75212a Datasheet - Page 17

• Manufacturer Part Number: upd75212a
• Description: 4-bit Single-chip Microcomputer
• Manufacturer: Renesas Electronics Corporation.

5. PERIPHERAL HARDWARE FUNCTIONS
5.1
Port Name
I/O ports have the following three functions.
PORT2
PORT4
PORT5
PORT3
PORT6
PORTH
PORT0
PORT1
CMOS input
CMOS input/output
P-ch open-drain, high-voltage, high-current output : 4
Total
PORTS
4-bit input
4-bit
input/output
4-bit output
Function
Always read or test possible irrespective of the dual-function
pin operating mode.
Always read or test possible, P10 and P11 are inputs with the
noise elimination function.
Ports 4 and 5 can input/output data in pairs in 8-bit units.
Ports 4 and 5 can directly drive LEDs.
Can be set bit-wise to the input or output mode. Port 6 can
incorporate a pull-down resistor as a mask option.
P-ch open-drain high-voltage, high-current output port. Can
drive an FIP and LED directly. Can incorporate a pull-down
resistor bit-wise as a mask option.
Can be set to the input or output mode in 4-bit units.
Table 5-1 Port Functions
Operation and Feature
: 8
: 20
32
Shares the pins with SI, SO, SCK
and INT4.
Shares the pins with INT0 to INT
2 and TI0.
P23 shares the pin with BUZ.
Shares the pins with T10/S15 to
T13/S12.
Remarks
PD75212A
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