SST89E554 SST [Silicon Storage Technology, Inc], SST89E554 Datasheet - Page 22

• Manufacturer Part Number: SST89E554
• Description: FlashFlex51 MCU
• Manufacturer: SST [Silicon Storage Technology, Inc]

SPI Status Register (SPSR)
SPI Data Register (SPDR)
Power Control Register (PCON)
©2001 Silicon Storage Technology, Inc.
Location
Location
Location
AAH
86H
87H
Symbol
SPIF
WCOL
Symbol
SMOD1
SMOD0
BOF
POF
GF1
GF0
PD
IDL
SMOD1
SPD7
SPIF
7
7
7
SMOD0
WCOL
SPD6
Function
Upon completion of data transfer, this bit is set to 1. If SPIE =1 and ES =1, an interrupt is
then generated. To clear, read SPSR and then access SPDR.
Set if the SPI data register is written to during data transfer. To clear, read SPSR and
then access SPDR.
Function
Double Baud rate bit. If SMOD1 = 1, Timer 1 is used to generate the baud rate.
FE/SM0 Selection bit.
0: SCON[7] = SM0
1: SCON[7] = FE,
Brown-out detection status bit, this bit will not be affected by any other reset. BOF should
be cleared by software. Power-on reset will also clear the BOF bit.
0: No Brown-out.
1: Brown-out occurred
Power-on reset status bit, this bit will not be affected by any other reset. POF should be
cleared by software.
0: No Power-on reset.
1: Power-on reset occurred
General-purpose flag bit.
General-purpose flag bit.
Power-down bit.
0: Power-down mode is not activated.
1: Activates Power-down mode.
Idle mode bit.
0: Idle mode is not activated.
1: Activates Idle mode.
6
6
6
SPD5
BOF
5
5
5
-
SST89E564 / SST89V564 / SST89E554 / SST89V554
SPD4
POF
4
4
4
-
22
SPD3
GF1
3
3
3
-
SPD2
GF0
2
2
2
-
SPD1
PD
1
1
1
-
Preliminary Specifications
FlashFlex51 MCU
SPD0
IDL
0
0
0
-
S71181-03-000 9/01
Reset Value
Reset Value
Reset Value
00010000b
00xxxxxxb
00H
384