P89LV51RD2 Philips Semiconductors, P89LV51RD2 Datasheet - Page 44

• Manufacturer Part Number: P89LV51RD2
• Description: 8-bit 80C51 3 V low power 64 kB Flash microcontroller with 1 kB RAM
• Manufacturer: Philips Semiconductors

Philips Semiconductors
9397 750 14101
Product data
Fig 18. SPI transfer format with CPHA = 0.
Fig 19. SPI transfer format with CPHA = 1.
SCK (CPOL=0)
SCK (CPOL=1)
SCK (CPOL=0)
SCK (CPOL=1)
(for reference)
(for reference)
(from Master)
(from Master)
SS (to Slave)
SS (to Slave)
SCK Cycle #
SCK Cycle #
(from Slave)
(from Slave)
MOSI
MISO
MOSI
MISO
Table 32:
Table 33:
Bit addressable; Reset source(s): any reset; Reset value: 00000000B
Table 34:
SPR1
0
0
1
1
Bit
7
6
5 to 0
Bit
Symbol
MSB
SPCR - SPI control register (address D5H) clock rate selection
SPSR - SPI status register (address AAH) bit allocation
SPSR - SPI status register (address AAH) bit description
MSB
Symbol
SPIF
WCOL
-
MSB
SPIF
MSB
1
1
7
Rev. 03 — 11 October 2004
2
2
6
6
6
6
WCOL
SPR0
0
1
0
1
6
3
3
Description
SPI interrupt flag. Upon completion of data transfer, this bit is set to
‘1’. If SPIE = 1 and ES = 1, an interrupt is then generated. This bit
is cleared by software.
Write Collision Flag. Set if the SPI data register is written to during
data transfer.
This bit is cleared by software.
Reserved for future use. Should be set to
5
5
5
5
4
4
4
4
4
4
5
-
5
5
3
3
3
3
6
6
2
2
2
2
4
-
SCK = f
4
16
64
128
8-bit microcontrollers with 80C51 core
7
7
1
1
1
1
osc
3
LSB
-
LSB
LSB
8
8
divided by
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
LSB
002aaa529
P89LV51RD2
002aaa530
2
-
‘0’
by user programs.
1
-
44 of 77
0
-