184
Chapter 5
Memory Access Control Function (
μ
PD70F3187 only)
User’s Manual U16580EE3V1UD00
5.1.3 SRAM, external ROM, external I/O access
Figure 5-2:
SRAM, External ROM, External I/O Access Timing (1/8)
(a) Read
Notes: 1.
CSn output levels depend on the accessed area when enabled by BCT0 and BCT1
registers.
2.
BEN0 to BEN3 output levels depend on the accessed type (byte, half-word, or word) and
the external bus size (8, 16, or 32 bits) specified by the BSC register
Remarks: 1.
n = 0, 1, 3, 4
2.
Bus clock = f
XX
/2
3.
The circle indicates the sampling timing.
4.
The dashed line indicates the high impedance state.
Bus clock
A0 to A21
(output)
D0 to D31
(input)
CSn (output)
BEN0
BEN3
to
(output)
RD (output)
WR (output)
WAIT (input)
T1
T2
T1
TW
T2
without data wait insertion
H
with data wait insertion
Address
Note 1
Address
Note 2
Data
Data
Note 2
Note 1
Содержание MuPD70F3187
Страница 6: ...6 Preface User s Manual U16580EE3V1UD00 ...
Страница 16: ...16 User s Manual U16580EE3V1UD00 ...
Страница 28: ...28 User s Manual U16580EE3V1UD00 ...
Страница 32: ...32 User s Manual U16580EE3V1UD00 ...
Страница 84: ...84 Chapter 2 Pin Functions User s Manual U16580EE3V1UD00 MEMO ...
Страница 144: ...144 Chapter 3 CPU Functions User s Manual U16580EE3V1UD00 MEMO ...
Страница 192: ...192 Chapter 5 Memory Access Control Function μPD70F3187 only User s Manual U16580EE3V1UD00 MEMO ...
Страница 312: ...312 Chapter 9 16 Bit Timer Event Counter P User s Manual U16580EE3V1UD00 MEMO ...
Страница 534: ...534 Chapter 11 16 bit Timer Event Counter T User s Manual U16580EE3V1UD00 ...
Страница 969: ...969 Chapter 20 Port Functions User s Manual U16580EE3V1UD00 MEMO ...
Страница 970: ...970 Chapter 20 Port Functions User s Manual U16580EE3V1UD00 ...
Страница 976: ...976 Chapter 22 Internal RAM Parity Check Function User s Manual U16580EE3V1UD00 MEMO ...
Страница 984: ...984 Chapter 23 On Chip Debug Function OCD User s Manual U16580EE3V1UD00 MEMO ...
Страница 1006: ...1006 Chapter 24 Flash Memory User s Manual U16580EE3V1UD00 MEMO ...
Страница 1036: ...1036 Chapter 27 Recommended Soldering Conditions User s Manual U16580EE3V1UD00 MEMO ...
Страница 1046: ...1046 Appendix A Index User s Manual U16580EE3V1UD00 MEMO ...
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