Renesas M32R/ECU Series User Manual page 495

12
SIO0
SIO0 Transmit Buffer Register
TXD0
RXD0
BCLK
SIO1
TXD1
SIO1 Receive Shift Register
RXD1
SIO2
TXD2
RXD2
SIO3
TXD3
RXD3
SIO3 Receive Shift Register
SIO4
TXD4
RXD4
SIO5
TXD5
RXD5
Notes: • When BCLK is selected, the BRG set value is subject to limitations.
• SIO2 and SIO3 do not have the SCLKI/SCLKO function.
Figure 12.1.1 Block Diagram of SIO0–SIO5
SIO0 Transmit Shift Register
Transmit/
Receive
SIO0 Receive Shift Register
SIO0 Receive Buffer Register
UART
mode
BCLK,
1/16
BCLK/8,
1
BCLK/32,
(set value + 1)
BCLK/256
Baud Rate
Clock
Generator
Divider
(BRG)
SIO1 Transmit Shift Register
Transmit/
Receive
SIO2 Transmit Shift Register
Transmit/
Receive
SIO2 Receive Shift Register
SIO3 Transmit Shift Register
Transmit/
Receive
SIO4 Transmit Shift Register
Transmit/
Receive
SIO4 Receive Shift Register
SIO5 Transmit Shift Register
Transmit/
Receive
SIO5 Receive Shift Register
Transmit interrupt request
Receive interrupt request
Control
Transmit DMA transfer request
Circuit
Receive DMA transfer request
CSIO
mode
When external clock selected
When internal clock selected
1/2
CSIO mode
When internal clock selected
When UART mode selected
Transmit interrupt request
Receive interrupt request
Transmit DMA transfer request
Control
Circuit
Receive DMA transfer request
Transmit interrupt request
Receive interrupt request
Control Transmit DMA transfer request
Circuit
Receive DMA transfer request
Transmit interrupt request
Receive interrupt request
Transmit DMA transfer request
Control
Circuit
Receive DMA transfer request
Transmit interrupt request
Receive interrupt request
Control
Circuit
Transmit interrupt request
Receive interrupt request
Control
Circuit
12-4
Serial I/O
12.1 Outline of Serial I/O
To the Interrupt
Controller (ICU)
To DMA3, DMA4
To DMA4
SCLKI0/SCLKO0
To the Interrupt
Controller (ICU)
To DMA6
To DMA3, DMA6
SCLKI1/SCLKO1
To DMA7
To DMA5
To the Interrupt
Controller (ICU)
To DMA7, DMA9
To DMA8
SCLKI4/SCLKO4
To the Interrupt
Controller (ICU)
SCLKI5/SCLKO5
32180 Group User's Manual (Rev.1.0)