MN673794 Datasheet, PDF (9/42 Pages) Panasonic Semiconductor – LSI FOR MPEG

MN673794
3. Microcontroller Interface
(1) Overview
Data is written to and read from the internal registers of the IC through microcontroller interfaces. A
microcontroller to be connected to the IC has two types of interfaces in consideration of two cases, where
the address, data, and control line are synchronous with the system clock of the IC and where they are not
synchronous with the system clock. The two types of interfaces are available in both cases. One of them is
an address/data multiple bus interface, which enables the data bus to be overlapped with addresses, and the
other is an interface for address/data bus separation. These cases and types are selectable with the external
pins of the IC as shown in table 3.1.
Table 3.1
Pin setting (Pin number)
No. 204
No. 205
(MICOMSEL)
(NC3)
0
0
0
1
1
0
1
1
Protocol Settings for Microcontroller Interface
Protocol
Sync/Async with
system clock
Separation/Multiple
address data bus
Async
Separation
Sync
Separation
Async
Multiple
Sync
Multiple
(2) Microcontroller Interface Signals
Table 3.2 shows the respective microcontroller interface signals and corresponding pins that appear in the
microcontroller timing chart.
Table 3.2
Signal
Address
Data
CS (chip select)
WE (write enable)
RE (read enable)
Interface Signals and Corresponding Pins
Interface
Interface
(separation/multiple)
(separation/multiple)
signals not synchronous signals synchronous with
with system clock
system clock
MAD
Adress
MDA
Data
MCSALE
CS
MNWENBW
WE
MNRE
RE
SDF00032BEM
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