參數(shù)資料
型號(hào)： M34282M2-XXXGP
元件分類： 微控制器/微處理器
英文描述： 4-BIT, MROM, 1 MHz, MICROCONTROLLER, PDSO20
封裝： 0.225 INCH, 0.65 MM PITCH, PLASTIC, SSOP-20
文件頁(yè)數(shù)： 56/71頁(yè)
文件大?。?/td> 547K
代理商： M34282M2-XXXGP
Rev.1.33
Mar 18, 2004
page 4 of 67
4282 Group
CONNECTIONS OF UNUSED PINS
Pin
D0–D7
E0, E1
E2
G0–G3
Connection
Open or connect to VDD pin (Note 1).
Set the output latch to “1” and open, or
connect to VDD pin (Note 2).
Open or connect to VSS pin.
Set the output latch to “1” and open, or
connect to VDD pin (Note 2).
Notes 1: Ports D4–D7: Set the bit 2 (PU02) of the pull-down control register PU1 to “0” by software and turn the pull-down transistor
OFF.
2: Set the corresponding bits of the pull-down control register PU0 to “0” by software and turn the pull-down transistor OFF.
(Note in order to set the output latch to “1” to make pins open)
After system is released from reset, a port is in a high-impedance state until the output latch of the port is set to “1” by software.
Accordingly, the voltage level of pins is undefined and the excess of the supply current may occur.
To set the output latch periodically is recommended because the value of output latch may change by noise or a program run away
(caused by noise).
(Note when connecting to VSS and VDD)
Connect the unused pins to VSS or VDD at the shortest distance and use the thick wire against noise.
PORT FUNCTION
Control
bits
1 bit
Output:
2 bits
Input:
3 bits
4 bits
1 bit
Control
instructions
SD
RD
CLD
SD
RD
CLD
SZD
OEA
IAE
OGA
IAG
SCAR
RCAR
Control
registers
PU1
PU0
Output structure
P-channel open-drain
CMOS
Input/
Output
(4)
I/O
(4)
I/O
(2)
Input
(1)
I/O
(4)
Output
(1)
Remark
Pull-down function and
key-on wakeup function
(programmable)
Pull-down function and
key-on wakeup function
(programmable)
Pull-down function and
key-on wakeup function
(programmable)
Pin
D0–D3
D4–D7
E0
E1
E2
G0–G3
CARR
Port
Port D
Port E
Port G
Port CARR
DEFINITION OF CLOCK AND CYCLE
System clock (STCK)
The system clock is the source clock for controlling this product.
It can be selected as shown below whether to use the CCK
instruction.
CCK instruction
When not using
When using
Instruction clock
f(XIN)/32
f(XIN)/4
System clock
f(XIN)/8
f(XIN)
Instruction clock (INSTCK)
The instruction clock is a signal derived by dividing the system
clock by 4, and is the basic clock for controlling CPU. The one
instruction clock cycle is equivalent to one machine cycle.
Machine cycle
The machine cycle is the cycle required to execute the
instruction.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
M34282T5-OPT 制造商:Renesas Electronics Corporation 功能描述:DEV OPTION BOARD FOR 4282 GROUP/PC4400 - Boxed Product (Development Kits)
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M34283G2GP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
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