145
User’s Manual U16580EE3V1UD00
Chapter 4
Bus Control Function (
μ
PD70F3187 only)
The
μ
PD70F3187 is provided with an external bus interface function by which external memories, such
as ROM and RAM, and external I/O can be connected. The
μ
PD70F3447 is not equipped external bus
interface function.
4.1 Features
•
32-bit/16-bit/8-bit data bus sizing function
•
8 chip areas select function
•
4 chip area select signals externally available (CS0, CS1, CS3 and CS4)
•
Wait function
- Programmable wait function, capable of inserting up to 7 wait states for each memory block
- External wait function via WAIT pin
•
Idle state insertion function
•
External device connection can be enabled via bus control/port alternate function pins
•
Programmable Endian format (Little Endian/Big Endian)
4.2 Bus Control Pins
The following pins are used for connecting to external devices.
Note:
Even if the port mode control registers for the
μ
PD70F3447 exist, it is prohibited to write other
values to these registers than the reset values.
Bus Control Pin
(Function when in Control Mode)
Function when in Port Mode
Register for Port/
Control Mode Switching
Note
Data bus (D0 to D15)
PDL0 to PDL15 (Port DL)
PMCDL
Data bus (D16 to D31)
PDH0 to PDH15 (Port DH)
PMCDH
Address bus (A0 to A15)
PAL0 to PAL15 (Port AL)
PMCAL
Address bus (A16 to A21)
PAH0 to PAH5 (Port AH)
PMCAH
Chip select (CS0, CS1, CS3 and CS4)
PCS0, PCS1, PCS3 and PCS4
(Port CS)
PMCCS
Read/write control (RD,WR)
PCT4, PCT5 (Port CT)
PMCCT
Byte enable control (BE0 to BE3)
PCD2 to PCD5 (Port CD)
PMCCD
External wait control (WAIT)
PCM0 (Port CM)
PMCCM
Summary of Contents for MuPD70F3187
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 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 ...
Page 1053: ......