12
12-4
Serial I/O
32180 Group User's Manual (Rev.1.0)
SCLKI0/SCLKO0
BCLK,
BCLK/8,
BCLK/32,
BCLK/256
Baud Rate
Generator
(BRG)
BCLK
(set value + 1)
1
Inter
n
a
l data
bu
s
CSIO mode
When internal clock selected
CSIO
mode
UART
mode
When internal clock selected
1/16
1/2
Clock
Divider
RXD0
TXD0
Receive interrupt request
Transmit/
Receive
Control
Circuit
SIO0 Transmit Buffer Register
SIO0 Transmit Shift Register
Receive DMA transfer request
Transmit interrupt request
Transmit DMA transfer request
To DMA3, DMA4
SIO0 Receive Shift Register
SIO0 Receive Buffer Register
When external clock selected
When UART mode selected
Notes: • When BCLK is selected, the BRG set value is subject to limitations.
• SIO2 and SIO3 do not have the SCLKI/SCLKO function.
SCLKI1/SCLKO1
To DMA6
To the Interrupt
Controller (ICU)
SIO0
SIO1
SIO2
SIO3
RXD1
TXD1
Transmit/
Receive
Control
Circuit
SIO1 Transmit Shift Register
SIO1 Receive Shift Register
To DMA7
RXD2
TXD2
Transmit/
Receive
Control
Circuit
SIO2 Transmit Shift Register
SIO2 Receive Shift Register
To DMA7, DMA9
RXD3
TXD3
Transmit/
Receive
Control
Circuit
SIO3 Transmit Shift Register
SIO3 Receive Shift Register
Receive interrupt request
Receive DMA transfer request
Transmit interrupt request
Transmit DMA transfer request
Receive interrupt request
Receive DMA transfer request
Transmit interrupt request
Transmit DMA transfer request
Receive interrupt request
Receive DMA transfer request
Transmit interrupt request
Transmit DMA transfer request
To the Interrupt
Controller (ICU)
To DMA8
To DMA5
To DMA3, DMA6
To DMA4
SIO4
RXD4
TXD4
Transmit/
Receive
Control
Circuit
SIO4 Transmit Shift Register
SIO4 Receive Shift Register
Receive interrupt request
Transmit interrupt request
SIO5
RXD5
TXD5
Transmit/
Receive
Control
Circuit
SIO5 Transmit Shift Register
SIO5 Receive Shift Register
Receive interrupt request
Transmit interrupt request
SCLKI4/SCLKO4
SCLKI5/SCLKO5
To the Interrupt
Controller (ICU)
To the Interrupt
Controller (ICU)
Figure 12.1.1 Block Diagram of SIO0–SIO5
12.1 Outline of Serial I/O
Summary of Contents for M32R/ECU Series
Page 17: ...12 This page is blank for reasons of layout...
Page 712: ...CHAPTER 18 OSCILLATOR CIRCUIT 18 1 Oscillator Circuit 18 2 Clock Generator Circuit...
Page 794: ...CHAPTER 22 TYPICAL CHARACTERISTICS...
Page 796: ...APPENDIX 1 MECHANICAL SPECIFICAITONS Appendix 1 1 Dimensional Outline Drawing...
Page 798: ...APPENDIX 2 INSTRUCTION PROCESSING TIME Appendix 2 1 32180 Instruction Processing Time...
Page 802: ...APPENDIX 3 PROCESSING OF UNUSED PINS Appendix 3 1 Example Processing of Unused Pins...