參數(shù)資料
型號(hào)： MC68HC68
廠商： Motorola, Inc.
英文描述： Real-Time Clock plus RAM with Serial Interface
中文描述： 實(shí)時(shí)時(shí)鐘加RAM的串行接口
文件頁(yè)數(shù)： 22/26頁(yè)
文件大?。?/td> 342K
代理商： MC68HC68
MC68HC68T1
22
MOTOROLA
CLOCK
BUTTON
ENABLED POWER
MC68HC68T1
XTAL
2 MHz
IGNITION
VBATT
POR
RESET
OSC 1
IRQ
SPI
PORT
12
9
2
3
7
3
1
39
2
27
8
20
28
40
16
11
12 V
+
–
0.1 F
NOTE 1
VSYS
VDD
LINE
PSE
CPUR
CLKOUT
INT
SPI
SS
15
14
10
13
NOTE 2
5 V
REG
100 k
MC68HC05C4
VSS
PORT
VDD
NOTES:
1. The VSYS and Line inputs can be used to sense the ignition turning on and off. An external switch is included to activate the
system without turning on the ignition. Also, the CMOS CPU is not powered down with the system VDD, but is held in a low
power reset mode during power–down. When restoring power, the MC68HC68T1 enables the CLKOUT pin and sets the
PSE and CPUR pins high.
2. If an MC68HC11 MCU is used, delete the capacitor at the RESET pin.
3. Voltage at pin must not exceed absolute maximum Vin specification.
VSS
1
Figure 21. Automotive System
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