PIC16C73A-04/SP Microchip Technology Inc., PIC16C73A-04/SP Datasheet - Page 91
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PIC16C73A-04/SP
Manufacturer Part Number
PIC16C73A-04/SP
Description
28 PIN, 7 KB OTP, 192 RAM, 22 I/O
Manufacturer
Microchip Technology Inc.
Datasheet
1.PIC16C73A-04SP.pdf
(289 pages)
Specifications of PIC16C73A-04/SP
A/d Inputs
5-Channel, 8-Bit
Cpu Speed
5 MIPS
Eeprom Memory
0 Bytes
Input Output
22
Interface
I2C/SPI/USART
Memory Type
OTP
Number Of Bits
8
Package Type
28-pin SPDIP
Programmable Memory
7K Bytes
Ram Size
192 Bytes
Speed
4 MHz
Timers
2-8-bit, 1-16-bit
Voltage, Range
2.5-5.5 V
Lead Free Status / Rohs Status
RoHS Compliant part
Electrostatic Device
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Figure 11-19 and Figure 11-20 show Master-transmit-
ter and Master-receiver data transfer sequences.
When a master does not wish to relinquish the bus (by
generating a STOP condition), a repeated START con-
dition (Sr) must be generated. This condition is identi-
cal to the start condition (SDA goes high-to-low while
FIGURE 11-19: MASTER-TRANSMITTER SEQUENCE
FIGURE 11-20: MASTER-RECEIVER SEQUENCE
FIGURE 11-21: COMBINED FORMAT
Transfer direction of data and acknowledgment bits depends on R/W bits.
Sr
A master reads a slave immediately after the first byte.
Combined format - A master addresses a slave with a 10-bit address, then transmits
1997 Microchip Technology Inc.
For 7-bit address:
Combined format:
A master transmitter addresses a slave receiver with a
7-bit address. The transfer direction is not changed.
S
S
For 7-bit address:
Slave Address
S
From slave to master
From master to slave
Slave Address R/W A Data A Data A P
Slave Address R/W A Data A/A Sr
From slave to master
From master to slave
First 7 bits
Slave Address R/W A Data A Data A/A P
From slave to master
From master to slave
'1' (read)
'0' (write)
(write)
(read)
R/W A
data to this slave and reads data from this slave.
(n bytes - acknowledge)
(n bytes - acknowledge)
Slave Address
Second byte
data transferred
data transferred
A = acknowledge (SDA low)
A = not acknowledge (SDA high)
S = Start Condition
P = Stop Condition
A = acknowledge (SDA low)
A = not acknowledge (SDA high)
S = Start Condition
P = Stop Condition
Sr = repeated
Start Condition
A = acknowledge (SDA low)
A = not acknowledge (SDA high)
S = Start Condition
P = Stop Condition
(n bytes + acknowledge)
(read or write)
Slave Address R/W A Data A/A
A
72 73 73A 74 74A 76 77
Data
Applicable Devices
A
(write)
Data A/A
For 10-bit address:
S
SCL is high), but occurs after a data transfer acknowl-
edge pulse (not the bus-free state). This allows a mas-
ter to send “commands” to the slave and then receive
the requested information or to address a different
slave device. This sequence is shown in Figure 11-21.
For 10-bit address:
S
Slave Address
Direction of transfer
may change at this point
Slave Address
First 7 bits
A master transmitter addresses a slave receiver
with a 10-bit address.
First 7 bits
Sr Slave Address
A master transmitter addresses a slave receiver
with a 10-bit address.
Sr
Slave Address
(write)
Data A
First 7 bits
First 7 bits
(write)
P
R/W A1 Slave Address
R/W A1 Slave Address
(read)
(read)
Data
R/W A Data A
R/W A3
Second byte
Second byte
A/A
PIC16C7X
P
Data A
DS30390E-page 91
A2
A2
Data
Data
A
A P
P
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