176
Chapter 4
Bus Control Function (
μ
PD70F3187 only)
User’s Manual U16580EE3V1UD00
4.7 Idle State Insertion Function
To facilitate interfacing with low-speed memory devices, an idle state (TI) can be inserted into the
current bus cycle after the T2 state to meet the data output float delay time (tdf) on memory read
access for each CS space. The bus cycle following the T2 state starts after the idle state is inserted.
An idle state is inserted after read/write cycles for SRAM, external I/O, or external ROM.
In the following cases, an idle state is inserted in the timing.
•
after read/write cycles for SRAM, external I/O, or external ROM
The idle state insertion setting can be specified by program using the bus cycle control register (BCC)
and the bus clock dividing control register (DVC).
Immediately after the system reset, idle state insertion is automatically programmed for all memory
blocks on read access.
Summary of Contents for V850E/PH2
Page 6: ...6 Preface User s Manual U16580EE3V1UD00...
Page 16: ...16 User s Manual U16580EE3V1UD00...
Page 28: ...28 User s Manual U16580EE3V1UD00...
Page 32: ...32 User s Manual U16580EE3V1UD00...
Page 84: ...84 Chapter 2 Pin Functions User s Manual U16580EE3V1UD00 MEMO...
Page 144: ...144 Chapter 3 CPU Functions User s Manual U16580EE3V1UD00 MEMO...
Page 192: ...192 Chapter 5 Memory Access Control Function PD70F3187 only User s Manual U16580EE3V1UD00 MEMO...
Page 312: ...312 Chapter 9 16 Bit Timer Event Counter P User s Manual U16580EE3V1UD00 MEMO...
Page 534: ...534 Chapter 11 16 bit Timer Event Counter T User s Manual U16580EE3V1UD00...
Page 969: ...969 Chapter 20 Port Functions User s Manual U16580EE3V1UD00 MEMO...
Page 970: ...970 Chapter 20 Port Functions User s Manual U16580EE3V1UD00...
Page 976: ...976 Chapter 22 Internal RAM Parity Check Function User s Manual U16580EE3V1UD00 MEMO...
Page 984: ...984 Chapter 23 On Chip Debug Function OCD User s Manual U16580EE3V1UD00 MEMO...
Page 1006: ...1006 Chapter 24 Flash Memory User s Manual U16580EE3V1UD00 MEMO...
Page 1036: ...1036 Chapter 27 Recommended Soldering Conditions User s Manual U16580EE3V1UD00 MEMO...
Page 1046: ...1046 Appendix A Index User s Manual U16580EE3V1UD00 MEMO...
Page 1052: ...1052 User s Manual U16580EE3V1UD00...
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