MC68HC11A1 MOTOROLA [Motorola, Inc], MC68HC11A1 Datasheet - Page 31

• Manufacturer Part Number: MC68HC11A1
• Description: 8-Bit Microcontrollers
• Manufacturer: MOTOROLA [Motorola, Inc]

SPR1 and SPR0 — SPI Clock Rate Selects
SPSR — Serial Peripheral Status Register
SPIF — SPI Transfer Complete Flag
WCOL — Write Collision
MODF — Mode Fault (A Mode Fault Terminates SPI Operation)
SPDR — SPI Data Register
MC68HC11A8
MC68HC11A8TS/D
RESET:
Set when an SPI transfer is complete. Cleared by reading SPSR with SPIF set followed by SPDR ac-
cess.
Set when SPDR is written while transfer is in progress. Cleared by SPSR with WCOL set followed by
SPDR access.
Set when SS is pulled low while MSTR = 1. Cleared by SPSR read with MODF set followed by SPCR
write.
SPIF
Bit 7
Bit 7
Bit 7
0
SPI is double buffered in, single buffered out.
WCOL
6
0
6
6
SPR [1:0]
00
01
10
11
5
0
0
5
5
MODF
Divide By
4
0
4
4
E-Clock
16
32
2
4
NOTE
3
0
0
3
3
E = 2 MHz (Baud)
Frequency at
2
0
0
2
2
62.5 kHz
1.0 MHz
500 kHz
125 kHz
1
0
0
1
1
$1029
$102A
Bit 0
Bit 0
Bit 0
0
0
MOTOROLA
31