UPD78F9202MA-CAC-A Datasheet, PDF (221/342 Pages) Renesas Technology Corp – 8-Bit Single-Chip Microcontrollers

CHAPTER 15 OPTION BYTE
<R>
15.1.2 μPD78F950x
(1) Selection of system clock source
• High-speed internal oscillation clock
• External clock input
(2) Low-speed internal oscillation clock oscillation
• Cannot be stopped.
• Can be stopped by software.
(3) Control of RESET pin
• Used as RESET pin
• RESET pin is used as an input-only port pin (P34) (see 15.3 Caution When the RESET Pin Is Used as
an Input-Only Port Pin (P34)).
• The on-chip pull-up resistor on RESET pin is selected, or RESET pin is set open.
(4) Oscillation stabilization time on power application or after reset release
• 2¹⁰/fX
• 2¹²/fX
• 2¹⁵/fX
• 2¹⁷/fX
03FFH/
07FFH/
0FFFH
Figure 15-2. Positioning of Option Byte (μPD78F950x)
Flash memory
(1024/2048/4096 × 8 bits)
0080H
0000H
Option byte
1
1
1 ENPU34 RMCE OSCSEL1 OSCSEL0 LIOSP
User’s Manual U18172EJ3V0UD
219