R01UH0823EJ0100 Rev.1.00
Page 1081 of 1823
Jul 31, 2019
RX23W Group
33. Serial Communications Interface (SCIg, SCIh)
Figure 33.64
Example of Operations at the Time of Start Frame Reception
CR0.RXDSF
STR.BFDF
STR.CF0MF
STR.CF1MF
(1)
(2)
(3)
(4)
(5)
Control Field 0
8 bits
Control Field 1
8 bits
Break Field low width
Start Frame
Information Frame
Data Field
Write 1 to
CR3.SDST
Specified period for
TCNT and TPRE
Write 1 to
STCR.BFDCL
Write 1 to
STCR.CF0MCL
Write 1 to
STCR.CF1MCL
The above diagram assumes the following:
ESMER: ESME = 1
CR1:
BFE = 1, CF0RE = 1, CF1DS[1:0] = 10b
PCR:
RXDXPS = 0
ICR:
BFDIE = 1, CF0MIE = 1, CF1MIE = 1
TMR:
TOMS[1:0] = 01b
Set to 0 after Break Field
low width detection
RXDX12 pin