Chapter 25 Mask Option/Option Byte; Mask Option (Mask Rom Versions) - NEC V850ES/KE1+ User Manual

25.1 Mask Option (Mask ROM Versions)

The mask ROM versions (
• Connection of pull-up resistor to P38 and P39 pins
• Enabling/disabling stopping internal oscillator by software
• Shortening oscillation stabilization time of main clock oscillation after release of reset
(1) Connection of pull-up resistor to P38 and P39 pins
PUmn
0 Not connected
1 Connected
Remark mn = 38, 39
(2) Enabling/disabling stopping internal oscillator by software
RSTP
0 Can be stopped by software
1 Setting invalid by software
Depending on whether the option to enable/disable stopping of internal oscillator by software is set or not, the
operation differs as follows.
Table 25-1. Option to Enable/Disable Stopping of Internal Oscillator by Software
Internal oscillator
WDT2 Count operation
Input clock
<R>
Operation mode
624

CHAPTER 25 MASK OPTION/OPTION BYTE

μ
PD703302 and 703302Y) have the following mask options.
Connection of Pull-up Resistor to Port mn
Control of Stopping Internal Oscillator by Software
RSTP = 0 (Can Be Stopped)
Internal oscillation clock: Can be stopped.
RCM.RSTOP bit can be set.
Operation can be stopped by
WDTM2.WDCS24 bit.
The following clock can be selected by the
WDTM2 register.
• Internal oscillation clock: f
• Subclock: f
XT
The following mode can be selected by the
WDTM2 register.
• NMI interrupt mode (INTWDT2)
• Reset mode (WDTRES2)
User's Manual U16896EJ2V0UD
Internal oscillation clock: Cannot be stopped.
Setting of RSTOP bit is invalid.
Operation cannot be stopped.
Fixed to Internal oscillation clock (f
(overflow time can be set)
/8
R
Fixed to reset mode (WDTRES2)
RSTP = 1 (Setting Invalid)
/8)
R