MEGA128CAN Datasheet, PDF (368/413 Pages) ATMEL Corporation – Microcontroller WITH 128K BYTES OF ISP FLASH AND CAN CONTROLLER

Table 147. External Data Memory Characteristics, V_CC = 2.7 - 5.5 Volts, SRWn1 = 0, SRWn0 = 1
4 MHz Oscillator
Variable Oscillator
Symbol Parameter
Min.
Max.
Min.
Max.
0 1/t_CLCL
10 t_RLDV
12 t_RLRH
15 t_DVWH
16 t_WLWH
Oscillator Frequency
Read Low to Data Valid
RD Pulse Width
Data Valid to WR High
WR Pulse Width
0.0
8
440
2.0 t_CLCL – 60
485
2.0 t_CLCL – 15
500
2.0 t_CLCL
485
2.0 t_CLCL – 15
Unit
MHz
ns
ns
ns
ns
Table 148. External Data Memory Characteristics, V_CC = 2.7 - 5.5 Volts, SRWn1 = 1, SRWn0 = 0
4 MHz Oscillator
Variable Oscillator
Symbol Parameter
Min.
Max.
Min.
Max.
0 1/t_CLCL
10 t_RLDV
12 t_RLRH
15 t_DVWH
16 t_WLWH
Oscillator Frequency
Read Low to Data Valid
RD Pulse Width
Data Valid to WR High
WR Pulse Width
0.0
8
690
3.0 t_CLCL – 60
735
3.0 t_CLCL – 15
750
3.0 t_CLCL
735
3.0 t_CLCL – 15
Unit
MHz
ns
ns
ns
ns
Table 149. External Data Memory Characteristics, V_CC = 2.7 - 5.5 Volts, SRWn1 = 1, SRWn0 = 1
4 MHz Oscillator
Variable Oscillator
Symbol Parameter
Min.
Max.
Min.
Max.
0 1/t_CLCL
Oscillator Frequency
0.0
8
10 t_RLDV
Read Low to Data Valid
690
3.0 t_CLCL – 60
12 t_RLRH
RD Pulse Width
735
3.0 t_CLCL – 15
14 t_WHDX
Data Hold After WR High
485
2.0 t_CLCL – 15
15 t_DVWH
Data Valid to WR High
750
3.0 t_CLCL
16 t_WLWH
WR Pulse Width
735
3.0 t_CLCL – 15
Unit
MHz
ns
ns
ns
ns
ns
368 AT90CAN128
4250E–CAN–12/04