Z51F0410 Datasheet, PDF (162/184 Pages) Zilog, Inc. – Z8051 Series 8-Bit Microcontrollers

Z51F0410
Product Specification
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Initial value : 00H
TCR[7:0] Flash and EEPROM Time control
Program and erase time is controlled by setting FETCR register. Program and erase timer uses 10-
bit counter. It increases by one at the edge of 128KHz clock (f_FETCR). It is cleared when program or
erase starts. Timer stops when 10-bit counter is same to FETCR. PEVBSY is cleared when program,
erase or verify start and set when program, erase or verify stop.
Maximum program/erase time: 1/f_FETCR * 1024 = 8ms (1/f_FETCR = 7.8us @128KHz clock)
In the case of 50% of error rate of counter source clock, program or erase time are 4~12ms
* Program/erase time calculation
for page write or erase, Tpe = (TCON+1) * 2 * 1/f_FETCR
for bulk erase, Tbe = (TCON+1) * 4 * 1/f_FETCR
※ Recommended program/erase time (FETCR = FFh)
Min
Typ
Max
Unit
program/erase time
2
4
6
ms
bulk erase time
4
8
12
ms
PS029502-0212
PRELIMINARY
159