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參數(shù)資料
| 型號(hào)： | MC68HC58DW |
| 廠商： | MOTOROLA INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 1 CHANNEL(S), LOCAL AREA NETWORK CONTROLLER, PDSO28 |
| 封裝： | SOIC-28 |
| 文件頁(yè)數(shù)： | 16/102頁(yè) |
| 文件大?。?/td> | 700K |
| 代理商： | MC68HC58DW |
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MOTOROLA
SIGNAL AND PIN DESCRIPTIONS
MC68HC58
2-4
TECHNICAL DATA
2.1.1.13 RST — DLC Reset
This pin is used to input an active-low system reset signal. RST must have an external
pull-up resistor.
2.1.1.14 REXT — External Bias Resistor
This pin connects an external bias resistor to the transceiver. The resistor value deter-
mines the waveform of the transmitted bus signal.
2.1.1.15 R/W — Read/Write Strobe
This pin is used to input a data direction control signal to the DLC. This signal is used
in conjunction with the ADDR0 signal to select the DLC at a specific address in the
MCU memory map.
2.1.1.16 V
BATT — Battery Voltage
This pin connects a separate switched or unswitched 12 Vdc power supply to the DLC
bus transceiver. This supply should be well regulated and protected against switching
transients.
2.1.1.17 V
CC — Analog Power Supply Voltage
This pin connects a nominal 5 Vdc power supply to the analog transceiver circuitry in
the DLC. For maximum noise immunity, V
CC supply path should be separate from VDD
supply path.
2.1.1.18 V
DD — Digital Power Supply Voltage
This pin connects a nominal 5 Vdc power supply to the digital control circuitry in the
DLC. For maximum noise immunity, the V
DD supply path should be separate from VCC
supply path.
2.1.1.19 V
SSA — Analog Power Ground
This pin provides the analog power ground connection to the DLC. Loss of analog
ground directly affects operation of the LOAD pin. For best noise immunity in opera-
tion, the V
SSA ground path should be separate from the VSSD ground path.
2.1.1.20 V
SSD — Digital Power Ground
This pin provides the digital power ground connection to the DLC. For best noise im-
munity in operation, the V
SSD ground path should be separate from the VSSA ground
path.
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