MC9328MXL Datasheet, PDF (19/84 Pages) Freescale Semiconductor, Inc – i.MX Integrated Portable System Processor

3.9 External Interface Module
Specifications
The External Interface Module (EIM) handles the interface to devices external to the MC9328MXL,
including the generation of chip-selects for external peripherals and memory. The timing diagram for the
EIM is shown in Figure 5, and Table 12 on page 20 defines the parameters of signals.
(HCLK) Bus Clock
1a
1b
Address
2a
2b
Chip-select
Read (Write)
OE (rising edge)
OE (falling edge)
EB (rising edge)
3a
4a
4c
5a
3b
4b
4d
5b
EB (falling edge)
5c
5d
6a
6b
LBA (negated falling edge)
6a
6c
LBA (negated rising edge)
Burst Clock (rising edge)
Burst Clock (falling edge)
Read Data
Write Data (negated falling)
Write Data (negated rising)
DTACK
7a
7c
9a
9a
10a
7b
7d
8b
8a
9b
9c
10a
Figure 5. EIM Bus Timing Diagram
MC9328MXL Advance Information, Rev. 5
Freescale Semiconductor
19