HT68FB240 Datasheet, PDF (81/133 Pages) Holtek Semiconductor Inc – USB Low Speed Flash Type MCU

HT68FB240
USB Low Speed 8-Bit Flash MCU
Rev. 1.00
SCS
S C K (C K P O L B = 1 )
S C K (C K P O L B = 0 )
SDO
D 7 /D 0 D 6 /D 1 D 5 /D 2 D 4 /D 3 D 3 /D 4 D 2 /D 5 D 1 /D 6 D 0 /D 7
S D I D a ta C a p tu re
SCS
W r ite to S IM D
( S D O d o e s n o t c h a n g e u n til fir s t S C K e d g e )
SPI Slave Mode Timing – CKEG=0
S C K (C K P O L B = 1 )
S C K (C K P O L B = 0 )
SDO
D 7 /D 0 D 6 /D 1 D 5 /D 2 D 4 /D 3 D 3 /D 4 D 2 /D 5 D 1 /D 6 D 0 /D 7
S D I D a ta C a p tu re
W r ite to S IM D
( S D O c h a n g e s a s s o o n a s w r itin g o c c u r s ; S D O
is flo a tin g if S C S = 1 )
N o te : F o r S P I s la v e m o d e , if S IM E N = 1 a n d C S E N = 0 , S P I is a lw a y s e n a b le d
a n d ig n o r e s th e S C S le v e l.
SPI Slave Mode Timing – CKEG=1
A
S P I tra n s fe r
C le a r W C O L
W r ite D a ta
in to S IM D
M a s te r
m a s te r o r
s la v e
S la v e
?
Y
W C O L=1?
S IM [2 :0 ]= 0 0 0 ,
0 0 1 ,0 1 0 ,0 1 1 o r 1 0 0
S IM [2 :0 ]= 1 0 1
N
C o n fig u r e C K P O L B ,
C K E G ,C S E N and M LS
S IM E N = 1
N
T r a n s m is s io n
c o m p le te d ?
(T R F = 1 ? )
Y
R e a d D a ta
fro m S IM D
A
C le a r T R F
SPI Transfer Control Flowchart
81
T ra n s fe r
N
F in is h e d ?
Y
END
April 18, 2014