h8s-2138 Renesas Electronics Corporation., h8s-2138 Datasheet - Page 453

• Manufacturer Part Number: h8s-2138
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Bit 4—Receive Enable (RE): Enables or disables the start of serial reception by the SCI.
Notes: 1. Clearing the RE bit to 0 does not affect the RDRF, FER, PER, and ORER flags, which
Bit 3—Multiprocessor Interrupt Enable (MPIE): Enables or disables multiprocessor interrupts.
The MPIE bit setting is only valid in asynchronous mode when receiving with the MP bit in SMR
set to 1.
The MPIE bit setting is invalid in synchronous mode or when the MP bit is cleared to 0.
Note:
Bit 2—Transmit End Interrupt Enable (TEIE): Enables or disables transmit-end interrupt
(TEI) request generation if there is no valid transmit data in TDR when the MSB is transmitted.
Bit 4
RE
0
1
Bit 3
MPIE
0
1
2. Serial reception is started in this state when a start bit is detected in asynchronous
* When receive data including MPB = 0 is received, receive data transfer from RSR to
retain their states.
mode or serial clock input is detected in synchronous mode.
SMR setting must be performed to decide the reception format before setting the RE bit
to 1.
RDR, receive error detection, and setting of the RDRF, FER, and ORER flags in SSR ,
is not performed. When receive data with MPB = 1 is received, the MPB bit in SSR is
set to 1, the MPIE bit is cleared to 0 automatically, and generation of RXI and ERI
interrupts (when the TIE and RIE bits in SCR are set to 1) and FER and ORER flag
setting is enabled.
Description
Reception disabled *
Reception enabled *
Description
Multiprocessor interrupts disabled (normal reception performed)
[Clearing conditions]
Multiprocessor interrupts enabled *
Receive interrupt (RXI) requests, receive-error interrupt (ERI) requests, and setting
of the RDRF, FER, and ORER flags in SSR are disabled until data with the
multiprocessor bit set to 1 is received.
When the MPIE bit is cleared to 0
When data with MPB = 1 is received
2
1
Section 15 Serial Communication Interface (SCI, IrDA)
Rev. 4.00 Jun 06, 2006 page 399 of 1004
REJ09B0301-0400
(Initial value)
(Initial value)