MITSUBISHI MICROCOMPUTERS
M37754M8C-XXXGP, M37754M8C-XXXHP
M37754S4CGP, M37754S4CHP
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
High-speed running (φ1 ≤ 20 MHZ)
Internal memory access
External memory access
2-φ access (Note)
3-φ access
Read
Write
Read
Write
φ
φ
φ
φ
RD
WR
Ai
RD
RD
WR
Ai
RD
WR
Ai
WR
ADRS
Ai
Di
ADRS
ADRS
ADRS
Di
W-D
Di
R-D
Di
W-D
1bus cycle = 3φ
1bus cycle = 3φ
1bus cycle = 2φ
1bus cycle = 2φ
3-φ access (Note)
4-φ access
Read
Write
Read
Write
φ
φ
φ
φ
RD
RD
RD
RD
WR
Ai
WR
Ai
WR
Ai
WR
Ai
ADRS
ADRS
ADRS
ADRS
W-D
Di
R-D
Di
W-D
1bus cycle = 4φ
Di
Di
1bus cycle = 3φ
1bus cycle = 3φ
1bus cycle = 4φ
5-φ access
Read
Write
φ
φ
RD
RD
WR
Ai
WR
Ai
ADRS
ADRS
Note: Refer to internal memory access bus cycle select bit (bit 2
of processor mode register 0 ; Figure 14).
Di
R-D
Di
W-D
1bus cycle = 5φ
ADRS : Address
R-D : Read data
W-D : Write data
1bus cycle = 5φ
Fig. 7 Bus cycle selection (high-speed running)
15
RENESAS [ RENESAS TECHNOLOGY CORP ]
