MCP7940NT MICROCHIP [Microchip Technology], MCP7940NT Datasheet - Page 16

• Manufacturer Part Number: MCP7940NT
• Manufacturer: MICROCHIP [Microchip Technology]

MCP7940N
5.2.2.3
Sequential reads are initiated in the same way as a
random read except that after the MCP7940N
transmits the first data byte, the master issues an
Acknowledge as opposed to the Stop condition used in
a random read. This Acknowledge directs the
MCP7940N
addressed 8-bit word
byte transmitted to the master, the master will NOT
FIGURE 5-5:
FIGURE 5-6:
DS25010A-page 16
BUS ACTIVITY
MASTER
SDA LINE
BUS ACTIVITY
Sequential Read
BUS ACTIVITY
MASTER
SDA LINE
BUS ACTIVITY
to
transmit
(Figure
RANDOM READ
SEQUENTIAL READ
CONTROL
BYTE
S
S
T
A
R
T
the
5-6). Following the final
1 1 0 1
A
C
K
CONTROL
BYTE
next
1 1 1
DATA n
sequentially
0
A
C
K
A
C
K
ADDRESS
BYTE
DATA n + 1
generate an Acknowledge but will generate a Stop
condition. To provide sequential reads, the MCP7940N
contains an internal Address Pointer which is
incremented by one at the completion of each
operation. This Address Pointer allows the entire
memory contents to be serially read during one
operation. The internal Address Pointer will automat-
ically roll over to the start of the Block.
A
C
K
S
S
T
A
R
T
1 0 1 0
A
C
K
CONTROL
DATA n + 2
BYTE
1
A
C
K
A
C
K
 2011 Microchip Technology Inc.
BYTE
DATA
DATA n + X
N
O
A
C
K
P
S
T
O
P
N
O
A
C
K
P
S
T
O
P