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Bus Controller (BC)
8-31
8.12 Accessing the Internal I/O Space
Accesses to the internal I/O space (I/O register) are performed through the I/O bus, with the bus controller controlling
the interface for read/write requests from the CPU. Accesses between the bus controller and the internal I/O space
are executed in synchronization with IOCLK. Fig. 8-12-1 shows the timing chart when accessing the internal I/O
space.
Fig. 8-12-1 Internal I/O Space Access
During a read, the address and the read request signal (RR) are output in synchronization with the rising edge of
IOCLK. After MCLK 1 cycle, the data strobe signals (DSn) are asserted, and the I/O side begins to drive the data
on the data bus. During a write, the address and the write request signal (WR) are output in synchronization with
the falling edge of IOCLK. After MCLK 1 cycle, the data strobe signals (DSn) are asserted, and are then negated
1/4 of an IOCLK cycle before the end of the I/O access cycle. The write is performed at the rising edge of the DSn
signals.
MCLK
IOCLK
I/O Bus
Address
WR
RR
DSn
Write
Read
I/O Bus
Data
Summary of Contents for MN103001G/F01K
Page 1: ...MICROCOMPUTER MN1030 MN103001G F01K LSI User s Manual Pub No 23101 050E ...
Page 2: ......
Page 4: ......
Page 6: ......
Page 8: ......
Page 9: ...Table of Contents List of Figures and Tables 0 ...
Page 26: ...xviii ...
Page 27: ...1 0 1 General Specifications ...
Page 35: ...2 CPU 2 ...
Page 57: ...3 Extension Instruction Specifications 3 ...
Page 96: ...Extension Instruction Specifications 3 40 ...
Page 97: ...4 Memory Modes 3 4 ...
Page 102: ...Memory Modes 4 6 ...
Page 103: ...5 Operating Mode 5 ...
Page 107: ...6 Clock Generator 6 13 ...
Page 111: ...7 Internal Memory 7 ...
Page 114: ...Internal Memory 7 4 ...
Page 115: ...8 Bus Controller BC 8 ...
Page 189: ...9 Interrupt Controller 9 ...
Page 220: ...Interrupt Controller 9 32 ...
Page 221: ...10 8 bit Timers 9 10 ...
Page 254: ...8 bit Timers 10 34 ...
Page 255: ...11 16 bit Timers 11 ...
Page 292: ...16 bit Timers 11 38 ...
Page 293: ...12 Watchdog Timer 11 12 ...
Page 302: ...Watchdog Timer 12 10 ...
Page 303: ...13 Serial Interface 13 ...
Page 354: ...Serial Interface 13 52 ...
Page 355: ...14 A D Converter 14 ...
Page 367: ...15 I O Ports 15 ...
Page 431: ...16 Internal Flash Memory 16 ...
Page 439: ...17 17 Ordering Mask ROM ...
Page 442: ...Ordering Mask ROM 17 4 ...
Page 443: ...Appendix ...