CDP1020 Просмотр технического описания (PDF) - Intersil
Номер в каталоге
Компоненты Описание
Список матч
CDP1020 Datasheet PDF : 23 Pages
| |||
CDP1020
1
2
34
5
4
6
47
SDA
SCK
FIGURE 5A. SINGLE BYTE WRITE OPERATION (WRITE $9A TO CDP1020 REGISTER $08)
1
2
34
5
4
6
4
8
47
SDA
SCK
FIGURE 5B. MULTIPLE BYTE WRITE OPERATION (WRITE $9A TO CDP1020 REGISTER $08, $55 TO REGISTER $09)
1
2
34
5
49
2
10 4
11
SDA
SCK
FIGURE 5C. SINGLE BYTE READ OPERATION (READ $9A FROM CDP1020 REGISTER $08)
12 7
1
2
34
5
49
2
10 4
11
13
14
12 7
FIGURE 5D. MULTIPLE BYTE READ OPERATION (READ $9A FROM CDP1020 REGISTER $08, $55 FROM REGISTER $09)
FIGURE 5. CDP1020 I 2C/SMBUS TRANSMISSION PROTOCOLS
TABLE 1.
NUMBER
DESCRIPTION
1
Start Condition, generated by I2C/SMBus master (defined
as negative edge on SDA while SCK is high).
2
CDP1020 I2C/SMBus slave address (7 bits)
NUMBER
DESCRIPTION
8
2nd data byte written to the CDP1020. This data will be
written to the register location set by the command byte, plus
one.
9
Repeated start condition
3
R/W bit, cleared indicating a write operation
10 R/W bit, set indicating a read operation
4
Acknowledge from CDP1020 (ack; active low on SDA)
11 1st byte of data read from the CDP1020, read from the
CDP1020 register location set by the command byte in the
write portion of the transmission.
5
Command byte sent from I2C/SMBus master. This data will
12 Negative master acknowledge. This signals to the CDP1020
be used to set the internal address pointer of the CDP1020.
that the master is done reading data and the CDP1020
should end transmission.
6
1st data byte written to the CDP1020. This data will be
written into the register specified by the command byte.
7
Stop condition, generated by the I2C/SMBus master
(defined as a positive edge on SDA while SCK is high).
13 Master Acknowledge. This is an indication from the master
that the read data has been received and the CDP1020
should continue to transmit data.
14 2nd data byte of read transmission. This data is read from
the CDP1020 register location set by the command byte
during the write portion of the transmission, plus one.
2-426
Share Link: 