MC68C812A4 Datasheet, PDF (7/18 Pages) Freescale Semiconductor, Inc – Technical Supplement MC68C812A4 3.3V Electrical Characteristics

Freescale Semiconductor, Inc.
Table 9 EEPROM Characteristics
V_DD = 3.3 Vdc ± 0.3V, V_SS = 0 Vdc, T_A = T_L to T_H, unless otherwise noted
Characteristic
Minimum programming clock frequency¹
Programming time
Clock recovery time following STOP, to continue programming
Erase time
Write/erase endurance
Symbol
f_PROG
t_PROG
t_CRSTOP
t_ERASE
Min
3.0
10,000
Typical Max Unit
MHz
20
ms
t_PROG+ 1 ms
20
ms
30,000
cycles
Data retention
10
years
NOTES:
1. RC oscillator must be enabled if programming is desired and f_SYS < f_PROG.
Table 10 Control Timing
Characteristic
Symbol
Frequency of operation
E-clock period
Crystal frequency
External oscillator frequency
Processor control setup time
t_PCSU = t_cyc/2+ 30
Reset input pulse width
To guarantee external reset vector
Minimum input time (can be preempted by internal reset)
Mode programming setup time
Mode programming hold time
Interrupt pulse width, IRQ, edge-sensitive mode, KWU
PW_IRQ = 2t_cyc + 20
Wait recovery startup time
Timer pulse width, input capture pulse accumulator input
PW_TIM = 2t_cyc + 20
f_o
t_cyc
f_XTAL
2f_o
t_PCSU
PW_RSTL
t_MPS
t_MPH
PW_IRQ
t_WRS
PW_TIM
5.0 MHz
Min Max
dc 5.0
200 —
— 10.0
dc 10.0
130 —
Unit
MHz
ns
MHz
MHz
ns
32
—
t_cyc
2
—
t_cyc
4
—
t_cyc
10 —
ns
420 —
ns
—
4
t_cyc
420 —
ns
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