p89v660 NXP Semiconductors, p89v660 Datasheet - Page 55

• Manufacturer Part Number: p89v660
• Description: P89v660/p89v662/p89v664 8-bit 80c51 5 V Low Power 16 Kb/32 Kb/64 Kb Flash Microcontroller With 512 B/1 Kb/2 Kb Ram, Dual I2c-bus, Spi
• Manufacturer: NXP Semiconductors

NXP Semiconductors
P89V660_662_664_2
Product data sheet
Table 41.
Table 42.
Table 43.
Bit addressable; Reset source(s): any reset; Reset value: 0000 0000B
Table 44.
Bit
2
1
0
SPR1
0
0
1
1
Bit
7
6
5 to 0
Bit
Symbol
Fig 24. SPI transfer format with CPHA = 0
SCK (CPOL = 0)
SCK (CPOL = 1)
(for reference)
(from master)
SS (to slave)
SCK cycle #
(from slave)
SPCR - SPI control register (address D5H) bit description
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
Symbol
CPHA
SPR1
SPR0
Symbol
SPIF
WCOL
-
SPIF
MOSI
MISO
7
SPR0
0
1
0
1
Rev. 02 — 29 January 2008
WCOL
6
Description
Clock Phase control bit. 1 = shift triggered on the trailing edge of the
clock; 0 = shift triggered on the leading edge of the clock.
SPI Clock Rate Select bit 1. Along with SPR0 controls the SCK rate of
the device when a master. SPR1 and SPR0 have no effect on the
slave. See
SPI Clock Rate Select bit 0. Along with SPR1 controls the SCK rate of
the device when a master. SPR1 and SPR0 have no effect on the
slave. See
Description
SPI interrupt flag. Upon completion of data transfer, this bit is set to ‘1’.
If SPIE = 1 and ES3 = 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 ‘0’ by user programs.
MSB
MSB
1
2
6
6
5
-
80C51 with 512 B/1 kB/2 kB RAM, dual I
Table
Table
SCK = f
6-clock mode
2
8
32
64
3
5
5
42.
42.
4
-
osc
4
4
4
divided by
5
3
3
P89V660/662/664
3
-
6
2
2
7
12-clock mode
4
16
64
128
1
1
2
-
…continued
LSB
LSB
8
© NXP B.V. 2008. All rights reserved.
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