参数资料
型号: DV164122
厂商: Microchip Technology
文件页数: 92/120页
文件大小: 0K
描述: ANALYZER SRL PICKIT W/DEMO BOARD
产品培训模块: Asynchronous Stimulus
标准包装: 1
系列: PICkit™
类型: MCU
适用于相关产品: PIC16F886
所含物品: PICkit?串行分析器,28 引脚演示板,USB 线缆和软件与说明文档光盘
配用: PKSERIAL-SPI1-ND - BOARD DEMO PICKIT SERIAL SPI
PKSERIAL-I2C1-ND - BOARD DEMO PICKIT SERIAL I2C
其它名称: Q3260228
PICkit? Serial Analyzer User’s Guide
The script (above) is interpreted as follows. TAG 0x81 instructs the COMM module to
generate an I 2 C ‘Start’ bit on the I 2 C bus. TAG 0x84 indicates 2 bytes will be transmitted
following the start – 0xA8 and 0x01. The first byte is the I 2 C slave address (with
write/read bit Reset) and a data/command byte of 0x01. The COMM module does not
place any significance on the value of the data bytes but merely transmits them ‘blindly’
– as instructed. The next TAG 0x83 instructs the COMM module to issue a Restart bit
on the I 2 C bus. TAG and data bytes - 0x84, 0x01, 0xA9 – will cause 1 byte (0xA9) to
be transmitted. Here again, the COMM module does not interpret the data – the I 2 C
slave will interpret 0xA9 as an address with write/read bit set. TAG 0x89 followed by
data byte 0x01 instructs the COMM module to attempt to read 1 byte from the slave
then issue a NACK on the bus. Finally, an I 2 C ‘Stop’ bit is issued according to tag 0x82.
The resulting I 2 C transaction looks like this on the bus:
[START][A8][01][RESTART][A9][data byte received][STOP]
As the script is executed, a data stream will be developed using TAGs/CDATA
(described in Table 9-19) and returned to the host software via CBUF2.
TABLE 9-19:
I 2 CM ‘DATA’ TAG BYTES
TAG/
CDATA
0x80
0x81
LEN
1
1
Name
I 2 CM_EVENT_START_TX
I 2 CM_EVENT_STOP_TX
Description
Start bit event
0
CDATA-TAG
Stop bit event
0
CDATA-TAG
0x82
1
I
2 CM_EVENT_RESTART_TX
Restart bit event
0
CDATA-TAG
0x83
1
I 2 CM_EVENT_ACK_TX
ACK bit event
0
CDATA-TAG
0x84
1
I
2 CM_EVENT_NACK_TX
NACK bit event
0
CDATA-TAG
0x85
1
I 2 CM_EVENT_ACK_RX
ACK bit event
0
CDATA-TAG
0x86
1
I
2 CM_EVENT_NACK_RX
NACK bit event
0
CDATA-TAG
0x87
2
I 2 CM_EVENT_BYTE_TX
BYTE transmit
0
CDATA-TAG
1
data
0x88
2
I
2 CM_EVENT_BYTE_RX
BYTE transmit
0
1
CDATA-TAG
data
0x89
2
I
2 CM_EVENT_XACT_ERR
transaction error
0
1
CDATA-TAG
error byte
0x8A
2
I
2 CM_EVENT_STATUS_ERR
status error
DS51647A-page 86
0
1
CDATA-TAG
error byte
? 2007 Microchip Technology Inc.
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