Serial Peripheral Interface (Spi) - Philips P89LPC938 User Manual

Philips Semiconductors
Table 86: Slave Transmitter mode
Status code Status of the I
(I2STAT) hardware
C0H Data byte in
I2DAT has been
transmitted;
NACK has been
received
C8H Last data byte in
I2DAT has been
transmitted
(AA = 0); ACK has
been received

13. Serial Peripheral Interface (SPI)

The P89LPC938 provides another high-speed serial communication interface, the SPI
interface. SPI is a full-duplex, high-speed, synchronous communication bus with two
operation modes: Master mode and Slave mode. Up to 3 Mbit/s can be supported in either
Master or Slave mode. It has a Transfer Completion Flag and Write Collision Flag
Protection.
User manual
...continued
2
C Application software response
to/from I2DAT to I2CON
STA
No I2DAT action 0
or
no I2DAT action or 0
no I2DAT action or 1
no I2DAT action 1
No I2DAT action 0
or
no I2DAT action or 0
no I2DAT action or 1
no I2DAT action 1
Rev. 03 — 7 June 2005
Next action taken by I
hardware
STO SI AA
0 0 0 Switched to not addressed SLA
mode; no recognition of own SLA or
General call address.
0 0 1 Switched to not addressed SLA
mode; Own slave address will be
recognized; General call address
will be recognized if I2ADR.0 = 1.
0 0 0 Switched to not addressed SLA
mode; no recognition of own SLA or
General call address. A START
condition will be transmitted when
the bus becomes free.
0 0 1 Switched to not addressed SLA
mode; Own slave address will be
recognized; General call address
will be recognized if I2ADR.0 = 1. A
START condition will be transmitted
when the bus becomes free.
0 0 0 Switched to not addressed SLA
mode; no recognition of own SLA or
General call address.
0 0 1 Switched to not addressed SLA
mode; Own slave address will be
recognized; General call address
will be recognized if I2ADR.0 = 1.
0 0 0 Switched to not addressed SLA
mode; no recognition of own SLA or
General call address. A START
condition will be transmitted when
the bus becomes free.
0 0 1 Switched to not addressed SLA
mode; Own slave address will be
recognized; General call address
will be recognized if I2ADR.0 = 1. A
START condition will be transmitted
when the bus becomes free.
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
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P89LPC938 User manual
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