NEC PD789860 User Manual page 60

Table 5-1. EEPROM Write Time (When Operating at f
EWCS102 EWCS101
1 0
1 1
Other than above
Notes 1. Be sure to set the EEPROM write time within the range of 3.3 to 6.6 ms.
2. Even if timer 40 output is disabled (TOE40 = 0), the timer output signal is internally supplied to
EEPROM.
Remark f : System clock oscillation frequency (ceramic/crystal oscillation)
X
Table 5-2. EEPROM Write Time (When Operating at f
EWCS102 EWCS101
0 1
1 1
Other than above
Notes 1. Be sure to set the EEPROM write time within the range of 3.3 to 6.6 ms.
2. Even if timer 40 output is disabled (TOE40 = 0), the timer output signal is internally supplied to
EEPROM.
Remark f : System clock oscillation frequency (RC oscillation)
CC
60
CHAPTER 5 EEPROM (DATA MEMORY)
EWCS100 EEPROM Timer Count Clock
7
0 f /2 (39.1 kHz)
X
0 Output of 8-bit timer 40
Setting prohibited
EWCS100 EEPROM Timer Count Clock
5
0 f /2 (31.3 kHz)
CC
0 Output of 8-bit timer 40
Setting prohibited
User's Manual U14826EJ5V0UD
= 5.0 MHz)
X
EEPROM Data Write Time
× 145 (3.71 ms)
7
2 /f
X
Output of 8-bit timer 40 × 145
Note 2
= 1.0 MHz)
CC
EEPROM Data Write Time
× 145 (4.64 ms)
5
2 /f
CC
Output of 8-bit timer 40 × 145
Note 2
Note 1
Note 1