MC9S12A128 Datasheet, PDF (85/92 Pages) Motorola, Inc – Microcontroller unit (MCU)

MC9S12A128 Device Guide — V01.01
Table A-19 Expanded Bus Timing Characteristics
Conditions are shown in Table A-4 unless otherwise noted, C_LOAD = 50pF
Num C
Rating
Symbol
1 P Frequency of operation (E-clock)
f_o
2 P Cycle time
t_cyc
3 D Pulse width, E low
PW_EL
4 D _{Pulse width, E high}⁽¹⁾
PW_EH
5 D Address delay time
t_AD
6 D Address valid time to E rise (PW_EL–t_AD)
t_AV
7 D Muxed address hold time
t_MAH
8 D Address hold to data valid
t_AHDS
9 D Data hold to address
t_DHA
10 D Read data setup time
t_DSR
11 D Read data hold time
t_DHR
12 D Write data delay time
t_DDW
13 D Write data hold time
t_DHW
14 D Write data setup time⁽¹⁾ (PW_EH–t_DDW)
t_DSW
15 D Address access time⁽¹⁾ (t_cyc–t_AD–t_DSR)
t_ACCA
16 D E high access time⁽¹⁾ (PW_EH–t_DSR)
t_ACCE
17 D Non-multiplexed address delay time
t_NAD
18 D Non-muxed address valid to E rise (PW_EL–t_NAD)
t_NAV
19 D Non-multiplexed address hold time
t_NAH
20 D Chip select delay time
t_CSD
21 D Chip select access time⁽¹⁾ (t_cyc–t_CSD–t_DSR)
t_ACCS
22 D Chip select hold time
t_CSH
23 D Chip select negated time
t_CSN
24 D Read/write delay time
t_RWD
25 D Read/write valid time to E rise (PW_EL–t_RWD)
t_RWV
26 D Read/write hold time
t_RWH
27 D Low strobe delay time
t_LSD
28 D Low strobe valid time to E rise (PW_EL–t_LSD)
t_LSV
29 D Low strobe hold time
t_LSH
30 D NOACC strobe delay time
t_NOD
31 D NOACC valid time to E rise (PW_EL–t_NOD)
t_NOV
Min
0
40
19
19
—
11
2
7
2
13
0
—
2
12
19
6
—
15
2
—
11
2
8
—
14
2
—
14
2
—
14
Typ
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Max
25.0
—
—
—
8
—
—
—
—
—
—
7
—
—
—
—
6
—
—
16
—
—
—
7
—
—
7
—
—
7
—
Unit
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
85