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Serial Interface
13-45
13.4.4 Description of Operation
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UART Serial Interface connection
Two different connection methods are possible, one for unidirectional transfer, and the other for bi-directional
transfer.
The SBO pin is always an output, and the SBI pin is always an input.
Fig. 13-4-2 Connections
■
UART serial interface bit rate
The UART serial interface has an internal 7-bit dedicated counter that supports fast bit rates even with a comparatively
slow clock source.
For example, when IOCLK is being used and a transfer is being performed, the division ratio should be set as
follows:
Note: When an external clock signal is used as the clock source, the high and low widths of the external clock must
be at least 10, 5, or 2.5 SYSCLK cycles when (MCLK frequency/SYSCLK frequency) = 1, 2, or 4, respectively.
SBO
SBI
SBT
SBO
SBI
SBT
SBO
SBI
SBO
SBI
SBT
SBT
Reception
Transmission
Transmission/
reception
Transmission/
reception
External
clock
External
clock
Unidirectional transfer
Bi-directional transfer
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 ...