mc9s12ne64 Freescale Semiconductor, Inc, mc9s12ne64 Datasheet - Page 541

• Manufacturer Part Number: mc9s12ne64
• Description: Hcs12 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

A.18
A timing diagram of the external multiplexed-bus is illustrated in Figure 18-25 with the actual timing
values shown on table Table A-32. All major bus signals are included in the diagram. Although both a data
write and data read cycle are shown, only one or the other would occur on a particular bus cycle.
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
External Bus Timing
data
data
5
9
20
23
17
26
Figure 18-25. General External Bus Timing
3
MC9S12NE64 Data Sheet, Rev. 1.1
18
21
24
27
6
addr
addr
15
1, 2
12
7
28
16
8
4
14
data
29
10
data
11
19
22
25
13
External Bus Timing
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