M30622MA-XXXFP RENESAS [Renesas Technology Corp], M30622MA-XXXFP Datasheet - Page 524

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M30622MA-XXXFP

Manufacturer Part Number
M30622MA-XXXFP
Description
16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
External Buses
5.2 Data Access
Figure 5.2.1. Level of BYTE pin and external data bus width
5.2.1 Data Bus Width
If the voltage level input to the BYTE pin is “H”, the external data bus width becomes 8 bits, and P1
D
If the voltage level input to the BYTE pin is “L”, the external data bus width becomes 16 bits, and P1
(/D
8
) through P1
8
) through P1
Bus width : 8-bit (BYTE = “H”)
Bus width : 16-bit (BYTE = “L”)
Note 1: Can be switched to I/O port using the port P4
Note 2: When reset, only CS
Note 3: The feature can be switched using the R/W mode select bit of processor mode register 0 (address 0004
Microcomputer
Microcomputer
I/O ports can be switched using the CSi output enable bit of the chip select control register (address 0008
7
P0
P1
P2
P3
P4
P4
P5
P5
7
(/D
P0
P1
P2
P3
P4
P4
P5
P5
0
0
0
0
0
4
0
3
(/D
0
0
0
0
0
4
0
3
to P0
to P1
to P2
to P3
to P4
to P4
to P5
to P5
to P0
to P1
to P2
to P3
to P4
to P4
to P5
to P5
15
15
) can be used as I/O ports (Figure 5.2.1).
7
7
7
7
3
7
2
7
7
7
7
7
3
7
2
7
) operate as a data bus (D
0
outputs a chip select signal. CS
RD, WRL, WRH / RD, BHE, WR (Note 3)
RD, WRL, WRH / RD, BHE, WR (Note 3)
Address bus A
Address bus A
Chip select
BCLK, HLDA, HOLD, ALE, RDY
Chip select
BCLK, HLDA, HOLD, ALE, RDY
Address bus A
Address bus A
Data bus D
Data bus D
Data bus D
I/O port
CS0 to CS3 (Note 2)
CS0 to CS3 (Note 2)
16
16
to A
to A
0
0
8
0
to D
0
0
to D
to D
to A
19
to P4
to A
19
(Note 1)
7
(Note 1)
7
15
15
15
3
function select bits of processor mode register 0 (address 0004
1
through CS
8
through D
External device
3
External device
become input ports.
15
) (Figure 5.2.1).
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
16
16
).
).
16
Mitsubishi microcomputers
M16C / 62 Group
).
0
(/
0
509

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