UPD78F9502MA-CAC-A NEC, UPD78F9502MA-CAC-A Datasheet - Page 133

• 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

13.1 Functions of Option Byte
power is supplied or when starting after a reset, the option byte is automatically referenced, and settings for the
specified functions are performed. When using the product, be sure to set the following functions by using the option
byte.
03FFH/
07FFH/
0FFFH
0080H
0000H
The address 0080H of the flash memory of the PD78F9500, 78F9501, 78F9502 is an option byte area. When
(1) Selection of system clock source
(2) Low-speed internal oscillation clock oscillation
(3) Control of RESET pin
(4) Oscillation stabilization time on power application or after reset release
High-speed internal oscillation clock
External clock input
Cannot be stopped.
Can be stopped by software.
Used as RESET pin
an Inport-Only Port Pin (P34) ).
The on-chip pull-up resistor on RESET pin is selected, or RESET pin is set open.
2
2
2
2
RESET pin is used as an input-only port pin (P34) (see 13.3 Caution When the RESET Pin Is Used as
10
12
15
17
/f
/f
/f
/f
X
X
X
X
(1024/2048/4096
Flash memory
8 bits)
Figure 13-1. Positioning of Option Byte
CHAPTER 13 OPTION BYTE
Preliminary User’s Manual U18681EJ1V0UD
Option byte
1
1
1
ENPU34
RMCE
OSCSEL1
OSCSEL0 LIOSP
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