Holtek HT67F2350 Manual page 201

HT67F2350/HT67F2360
HT67F2370/HT67F2390
Advanced A/D Flash MCU with LCD & EEPROM
SCSA
SCKA (SACKPOLB=1)
SCKA (SACKPOLB=0)
SDOA
SDIA Data Capture
SPIA Transfer
Master
Master or Slave
?
SASPI[2:0]=000,
001, 010, 011 or 100
Configure SACKPOLB,
SACKEG, SACSEN and SAMLS
SPIAEN=1
A
Rev. 1.60
D7/D0 D6/D1 D5/D2
Write to SPIAD
(SDOA changes as soon as writing occurs; SDOA is floating if SCSA=1)
Note: For SPIA slave mode, if SPIAEN=1 and SACSEN=0, SPIA is always
enabled and ignores the SCSA level.
SPIA Slave Mode Timing – SACKEG=1
Clear SAWCOL
Slave
SASPI[2:0]=101
SPIA Transfer Control Flow Chart
201
D4/D3 D3/D4 D2/D5 D1/D6 D0/D7
A
Write Data
into SPIAD
Y
SAWCOL=1?
N
Transmission
N
completed?
(SATRF=1?)
Y
Read Data
from SPIAD
Clear SATRF
Transfer
finished?
Y
END
May 16, 2019
N