HD64F3642AHV Datasheet, PDF (304/551 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

Section 10 Serial Communication Interface
Bit 6Extended Data Bit (SOL): Bit 6 sets the SO₁ output level. When read, SOL returns the
output level at the SO₁ pin. After completion of a transmission, SO₁ continues to output the value
of the last bit of transmitted data. The SO₁ output can be changed by writing to SOL before or
after a transmission. The SOL bit setting remains valid only until the start of the next transmission.
SSB mode settings also become invalid. To control the level of the SO₁ pin after transmission
ends, it is necessary to write to the SOL bit at the end of each transmission. Do not write to this
register while transmission is in progress, because that may cause a malfunction.
Bit 6: SOL
0
1
Description
Read: SO1 pin output level is low
Write: SO1 pin output level changes to low
Read: SO1 pin output level is high
Write: SO1 pin output level changes to high
(initial value)
Bit 5Overrun Error Flag (ORER): When an external clock is used, bit 5 indicates the
occurrence of an overrun error. If noise occurs during a transfer, causing an extraneous pulse to be
superimposed on the normal serial clock, incorrect data may be transferred. If a clock pulse is
input after transfer completion, this bit is set to 1 indicating an overrun.
Bit 5: ORER
0
1
Description
Clearing condition:
After reading ORER = 1, cleared by writing 0 to ORER
(initial value)
Setting condition:
Set if a clock pulse is input after transfer is complete, when an external clock is
used
Bits 4 to 2Reserved Bits: Bits 4 to 2 are reserved. They are always read as 0, and cannot be
modified.
Bit 1TAIL MARK Transmit Flag (MTRF): When bit MRKON is set to 1, bit 1 indicates that
TAIL MARK is being sent. Bit 1 is a read-only bit and cannot be modified.
Bit 1: MTRF
0
1
Description
Idle state, or 8- or 16-bit data is being transferred
TAIL MARK is being sent
(initial value)
Rev. 6.00 Sep 12, 2006 page 282 of 526
REJ09B0326-0600