HD6433937 Datasheet, PDF (257/521 Pages) Hitachi Semiconductor – Hardware Manual

Bits 7 and 6: Operating mode select 1 and 0 (SNC1, SNC0)
Bits 7 and 6 select the operating mode.
Bit 7
SNC1
Bit 6
SNC0
Description
0
0
8-bit synchronous mode
0
1
16-bit synchronous mode
1
0
Continuous clock output mode*¹
1
1
Reserved*²
Notes: 1. Use SI1 and SO1 as ports.
2. Do not set bits SNC1 and SNC0 to 11.
(initial value)
Bit 5: Tail mark control (MRKON)
Bit 5 controls tail mark output after transfer of 8-bit or 16-bit data.
Bit 5
MRKON
Description
0
Tail mark is not output (synchronous mode)
(initial value)
1
Tail mark is output (SSB mode)*
Note: * SCI1 is an internal function that performs interfacing to the on-chip FLEX™ decoder. It
cannot be used with SSB mode selected.
Bit 4: LATCH TAIL select (LTCH)
Bit 4 selects whether LATCH TAIL or HOLD TAIL is output as the tail mark when MRKON = 1
(i.e. in SSB mode).
Bit 4
LTCH
0
1
Description
HOLD TAIL is output
LATCH TAIL is output
(initial value)
245