hd64338342hw Renesas Electronics Corporation., hd64338342hw Datasheet - Page 378
hd64338342hw
Manufacturer Part Number
hd64338342hw
Description
Renesas 8-bit Single-chip Microcomputer H8 Family/h8/300l Super Low Power Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.HD64338342HW.pdf
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Section 10 Serial Communication Interface
(5) Read the transfer data from SDRL/SDRU.
(6) If the serial clock continues to be input after the end of reception, this is regarded as an overrun
Simultaneous transmitting and receiving: The procedure for simultaneously transmitting and
receiving data is as follows.
(1) Set SO1, SI1, and SCK1 all to 1 in PMR2 to designate the SO1, SI
(2) Clear SNC1 in SCR1 to 0, clear or set SNC0 to 0 or 1, and clear MRKON to 0, to select 8-bit
(3) Write the transfer data to SDRL/SDRU.
(4) When STF is set to 1 in SCSR1, SCI1 starts operating and transmit data is output from the SO
(5) After transmission/reception is completed, IRRS1 is set to 1 in IRR1.
(6) Read the transfer data from SDRL/SDRU.
When an internal clock is used, the serial clock is output from the SCK
transmit data output. When transmission ends, the serial clock is not output until the start flag is
next set to 1. During this interval, the SO
data.
When an external clock is used, data is transmitted and received in synchronization with the clock
input from the SCK
transmission/reception, this is regarded as an overrun state, and the ORER flag is set to 1 in
SCSR1 (consequently, transmission/reception is not performed).
While transmission is halted, the output value of the SO
bit in SCSR1.
Rev. 6.00 Aug 04, 2006 page 342 of 680
REJ09B0145-0600
8-bit transfer mode: SDRL
16-bit transfer mode: Upper byte from SDRU, lower byte from SDRL
state, and the ORER flag is set to 1 in SCSR1 (consequently, reception is not performed).
necessary, also designate the SO
synchronous mode or 16-bit synchronous mode, and select the serial clock with bits CKS3 to
CKS0. When data is written to SCR1 with MRKON in SCR1 cleared to 0, the internal state of
SCI1 is initialized.
8-bit transfer mode: SDRL
16-bit transfer mode: Upper byte to SDRU, lower byte to SDRL
pin, or receive data is input from the SI
8-bit transfer mode: SDRL
16-bit transfer mode: Upper byte from SDRU, lower byte from SDRL
1
pin. If the serial clock continues to be input after the end of
1
pin as an NMOS open-drain output with bit POF1 in PMR2.
1
pin continuously outputs the last bit of the previous
1
pin.
1
pin can be changed by means of the SOL
1
1
, and SCK
pin simultaneously with
1
pin functions. If
1
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