參數(shù)資料
型號: μPD784038Y
廠商: NEC Corp.
英文描述: 8/16 Bit Single Chip Microcontrollers(8/16 位微控制器)
中文描述: 8 / 16位單片機微控制器(8 / 16位微控制器)
文件頁數(shù): 31/70頁
文件大?。?/td> 464K
代理商: ΜPD784038Y
31
m
PD784035Y,784036Y,784037Y,784038Y
Table 7-1. Port Functions
Port Name
Pin Name
Function
Specification of Pull-up Resistor
Connection by Software
Port 0
P00-P07
Can be set in input or output mode in
All port pins in input mode
1-bit units.
Can operate as 4-bit real-time output port
(P00 through P03 and P04 through P07)
Can drive transistor.
Port 1
P10-P17
Can be set in input or output mode in
All port pins in input mode
1-bit units.
Can drive LEDs.
Port 2
P20-P27
Input port
In 6-bit units (P22 through P27)
Port 3
P30-P37
Can be set in input or output mode in
All port pins in input mode
1-bit units.
Port 4
P40-P47
Can be set in input or output mode in
All port pins in input mode
1-bit units.
Can drive LEDs.
Port 5
P50-P57
Can be set in input or output mode in
All port pins in input mode
1-bit units.
Can drive LEDs.
Port 6
P60-P67
Can be set in input or output mode in
All port pins in input mode
1-bit units.
Port 7
P70-P77
Can be set in input or output mode in
1-bit units.
7.2 Clock Generation Circuit
An on-chip clock generation circuit necessary for operation is provided. This clock generation circuit has a divider
circuit. If high-speed operation is not necessary, the internal operating frequency can be lowered by the divider
circuit to reduce the current consumption.
Figure 7-2. Block Diagram of Clock Generation Circuit
Remark
f
XX
: oscillation frequency or external clock input
f
CLK
: internal operating frequency
X1
X2
f
XX
1/2
1/2
1/2
1/2
UART/IOE
INTP0 noise reduction circuit
Oscillation stabilization timer
f
XX
/2
f
CLK
CPU
Peripheral circuit
Oscillation
circuit
S
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