UPD78F9502MA-CAC-A NEC, UPD78F9502MA-CAC-A Datasheet - Page 140

• Manufacturer Part Number: UPD78F9502MA-CAC-A
• Description: 8BIT MCU, 4K FLASH, 128B RAM, SMD
• Manufacturer: NEC

Specifications of UPD78F9502MA-CAC-A

• Controller Family/series: UPD78F
• No. Of I/o's: 8
• Ram Memory Size: 128Byte
• Cpu Speed: 10MHz
• No. Of Timers: 2
• No. Of Pwm: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 4KB
• Oscillator Type: External, Internal

14.6
provided on the target system. First provide a function that selects the normal operation mode or flash memory
programming mode on the board.
the same status as immediately after reset. Therefore, if the external device does not recognize the state immediately
after reset, the pins must be processed as described below.
14.6.1 EXCLK pin
connected to an external device, a signal conflict occurs. To prevent the conflict of signals, isolate the connection with
the external device.
there is a possibility that cannot communicate depending on capacitor capacitance. When perform flash memory
programming, isolate connection with a condenser.
140
Note In the PD78F9500, 78F9501, 78F9502, the CLK and FLMD0 signals are connected to the EXCLK pin;
To write the flash memory on-board, connectors that connect the dedicated flash memory programmer must be
When the flash memory programming mode is set, all the pins not used for programming the flash memory are in
The state of the pins in the self programming mode is the same as that in the HALT mode.
The EXCLK pin is used as the serial interface of flash memory programming. Therefore, if the EXCLK pin is
When connected a capacitor to the EXCLK pin, waveform at the time of communication is changed. Therefore
CLK
FLMD0
SI/RxD
SO/TxD
/RESET
V
GND
Pin Name
Processing of Pins on Board
DD
Note
therefore, these signals need to be directly connected.
Note
Note
Note
Table 14-2. Wiring Between PD78F9500, 78F9501, 78F9502, and FlashPro4
Output
Output
Input
Output
Output
I/O
–
–
FlashPro4 Connection Pin
Clock to PD78F9500, 78F9501, 78F9502
On-board mode signal
Receive signal
Receive signal/on-board mode signal
Reset signal
V
Ground
DD
Figure 14-3. Wiring diagram with FlashPro4
/RESET
signal name
SO/TxD
FLMD0
SI/RxD
FlashPro4
voltage generation/voltage monitor
GND
CLK
V
DD
Preliminary User’s Manual U18681EJ1V0UD
CHAPTER 14 FLASH MEMORY
Pin Function
78F9501, 78F9502
1
2
3
4
5
PD78F9500,
EXCLK/P23
P22
RESET/P34
V
V
10
9
8
7
6
DD
SS
PD78F9500, 78F9501, 78F9502
Pin Name
Connection Pin
5
6
7
4
3
Pin No.