
Bus Controller (BC)
8-33
8.13.1 16-bit Bus with Fixed Wait States, in Synchronous Mode and in Address/Data Separate Mode
Setting of the various parameters for external memory access is performed in memory control registers 0 to 3,
corresponding to each block. In synchronous mode, the bus access is initiated in synchronization with SYSCLK.
When fixed wait insertion is specified, the bus access ends to the timing set in the memory control register.
Fig. 8-13-1 is the timing chart in the case of a “16-bit bus with fixed wait states, in synchronous mode, in address/
data separate mode, and with the frequency of MCLK equal to that of SYSCLK multiplied by four.”
Fig. 8-13-2 is the timing chart in the case of a “16-bit bus with fixed wait states, in synchronous mode, in address/
data separate mode, and with the frequency of MCLK equal to that of SYSCLK multiplied by two.”
Fig. 8-13-3 is the timing chart in the case of a “16-bit bus with fixed wait states, in synchronous mode, in address/
data separate mode, and with the frequency of MCLK equal to that of SYSCLK.”
BCS indicates the timing during one SYSCLK cycle at which the access should start, and is expressed in terms of
the number of MCLK pulses since the rising edge of SYSCLK.
Note that when writing to byte 0, WE0 is asserted and the data is output on D7 to 0, and when writing to byte 1,
WE1 is asserted and the data is output on D15 to 8.
In addition, in the case of a word access (32 bits), the external access is performed twice with A[1] = "0" and A[1]
= "1".
Fig. 8-13-1
Access Timing on a 16-bit Bus with Fixed Wait States, in Synchronous Mode and
in Address/Data Separate Mode (MCLK = SYSCLK multiplied by 4)
For details on the various timing settings, refer to the description of the memory control register in section 8.6,
“Description of Registers.”
An
Dn
WEn
RE
CSn
EA
MCLK
SYSCLK
BCS
BCE
BCS
BCE
REN
EA
WEN
Read
Write
:Undefined
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 ...