UPD75216ACW

Manufacturer Part NumberUPD75216ACW
Description4-BIT SINGLE-CHIP MICROCOMPUTER
ManufacturerNEC
UPD75216ACW datasheet
 


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Page 17/72:

PERIPHERAL HARDWARE FUNCTIONS

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5. PERIPHERAL HARDWARE FUNCTIONS
5.1
PORTS
I/O ports have the following three functions.
CMOS input (PORT0, 1)
CMOS input/output (PORT2, 3, 4, 5, 6)
P-ch open-drain, high-voltage, high-current output (PORTH) : 4
Total
Port Name
Function
PORT0
4-bit input
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
PORT1
noise elimination function.
PORT3
4-bit
Can be set bit-wise to the input or output mode. Port 6 can
PORT6
input/output
incorporate a pull-down resistor as a mask option.
Can be set to the input or output mode in 4-bit units.
PORT2
PORT4
Ports 4 and 5 can input/output data in pairs in 8-bit units.
Ports 4 and 5 can directly drive LEDs.
PORT5
PORTH
4-bit output
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.
: 8
: 20
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Table 5-1 Port Functions
Operation and Feature
PD75216A
Remarks
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.
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