mc9s12uf32 Freescale Semiconductor, Inc, mc9s12uf32 Datasheet - Page 119

• Manufacturer Part Number: mc9s12uf32
• Description: System Chip Guide V01.05
• Manufacturer: Freescale Semiconductor, Inc

A.5 External Bus Timing
A timing diagram of the external multiplexed-bus is illustrated in Figure A-1 with the actual timing
values shown on table Table A-15. All major bus signals are included in the diagram. While both a data
write and data read cycle are shown, only one or the other would occur on a particular bus cycle.
A.5.1 General Muxed Bus Timing
The expanded bus timings are highly dependent on the load conditions. The timing parameters shown
assume a balanced load across all outputs.
Freescale Semiconductor
ECLK
PE4
Addr/Data
(read)
PA, PB
Addr/Data
(write)
PA, PB
R/W
PE2
LSTRB
PE3
NOACC
PE7
PIPO0
PIPO1, PE6,5
data
data
5
9
Figure A-1 General External Bus Timing
20
23
17
26
3
18
21
24
27
6
addr
addr
15
1, 2
12
System on a Chip Guide — 9S12UF32DGV1/D V01.05
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28
16
8
4
14
data
29
10
data
11
19
22
25
13
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