H8SLASH3021 datasheet(374/712 Pages) RENESAS

374 / 712 page

11. Serial Communication Interface

Rev.2.00 Mar. 22, 2007 Page 350 of 684

REJ09B0352-0200

Bit 1—Multiprocessor Bit (MPB): Stores the value of the multiprocessor bit in receive data

when a multiprocessor format is used in asynchronous mode. MPB is a read-only bit and cannot

be written.

Bit 1

MPB

Description

Multiprocessor bit value in receive data is 0*

(Initial value)

Multiprocessor bit value in receive data is 1

Note:

If the RE bit is cleared to 0 when a multiprocessor format is selected, MPB retains its

previous value.

Bit 0—Multiprocessor Bit Transfer (MPBT): Stores the value of the multiprocessor bit added to

transmit data when a multiprocessor format is selected for transmitting in asynchronous mode.

The MPBT setting is ignored in synchronous mode, when a multiprocessor format is not selected,

or when the SCI is not transmitting.

Bit 0

MPBT

Description

Multiprocessor bit value in transmit data is 0

(Initial value)

Multiprocessor bit value in transmit data is 1

11.2.8

Bit Rate Register (BRR)

BRR is an 8-bit register that, together with the CKS1 and CKS0 bits in SMR that select the baud

rate generator clock source, determines the serial communication bit rate.

Bit

Initial value

Read/Write

R/W

The CPU can always read and write BRR. BRR is initialized to H'FF by a reset and in standby

mode.

The baud rate generator is controlled separately for the individual channels, so different values

may be set for each.

Table 11.3 shows examples of BRR settings in asynchronous mode. Table 11.4 shows examples of

BRR settings in synchronous mode.

H8/3021 Datasheet(PDF) 374 Page - Renesas Technology Corp