PIC16CE625-04E/SO Microchip Technology, PIC16CE625-04E/SO Datasheet - Page 31

• Manufacturer Part Number: PIC16CE625-04E/SO
• Description: IC MCU OTP 2KX14 EE COMP 18SOIC
• Manufacturer: Microchip Technology
• Series: PIC® 16Cr

Specifications of PIC16CE625-04E/SO

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 4MHz
• Peripherals: Brown-out Detect/Reset, POR, WDT
• Number Of I /o: 13
• Program Memory Size: 3.5KB (2K x 14)
• Program Memory Type: OTP
• Eeprom Size: 128 x 8
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 125°C
• Package / Case: 18-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Data Converters: -
• Connectivity: -

FIGURE 6-1:
FIGURE 6-2:
6.2
After generating a START condition, the processor
transmits a control byte consisting of a EEPROM
address and a Read/Write bit that indicates what type
of operation is to be performed. The EEPROM address
consists of a 4-bit device code (1010) followed by three
don’t care bits.
The last bit of the control byte determines the operation
to be performed. When set to a one, a read operation
is selected, and when set to a zero, a write operation is
selected. (Figure 6-3). The bus is monitored for its cor-
responding EEPROM address all the time. It generates
an acknowledge bit if the EEPROM address was true
and it is not in a programming mode.
SDA
SCL
1999 Microchip Technology Inc.
SCL
SDA
(A)
Device Addressing
CONDITION
START
(B)
DATA TRANSFER SEQUENCE ON THE SERIAL BUS
ACKNOWLEDGE TIMING
1
Transmitter must release the SDA line at this point
allowing the Receiver to pull the SDA line low to
acknowledge the previous eight bits of data.
2
3
Data from transmitter
4
ACKNOWLEDGE
ADDRESS OR
VALID
5
(C)
6
TO CHANGE
ALLOWED
7
DATA
Acknowledge
FIGURE 6-3:
8
Start Bit
Bit
S
9
1
Device Select
(D)
1
0
Receiver must release the SDA line at this
point so the Transmitter can continue
sending data.
Bits
Data from transmitter
EEPROM Address
CONTROL BYTE FORMAT
1
2
PIC16CE62X
0
3
Read/Write Bit
X
Don’t Care
Acknowledge Bit
Bits
X
DS40182C-page 31
X
CONDITION
R/W
STOP
(C)
ACK
(A)