PIC18F452-I/L Microchip Technology Inc., PIC18F452-I/L Datasheet - Page 136
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PIC18F452-I/L
Manufacturer Part Number
PIC18F452-I/L
Description
44 PIN, 32 KB FLASH, 1536 RAM, 34 I/O
Manufacturer
Microchip Technology Inc.
Datasheet
1.PIC18F452-IL.pdf
(332 pages)
Specifications of PIC18F452-I/L
A/d Inputs
8-Channel, 10-Bit
Comparators
2
Cpu Speed
10 MIPS
Eeprom Memory
256 Bytes
Input Output
36
Interface
I2C/SPI/USART
Memory Type
Flash
Number Of Bits
8
Package Type
44-pin PLCC
Programmable Memory
32K Bytes
Ram Size
1.5K Bytes
Speed
40 MHz
Timers
1-8-bit, 3-16-bit
Voltage, Range
2-5.5 V
Lead Free Status / Rohs Status
RoHS Compliant part
Electrostatic Device
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PIC18FXX2
15.4
The MSSP module in I
master and slave functions (including general call sup-
port) and provides interrupts on START and STOP bits
in hardware to determine a free bus (multi-master func-
tion). The MSSP module implements the Standard
mode specifications, as well as 7-bit and 10-bit
addressing.
Two pins are used for data transfer:
• Serial clock (SCL) - RC3/SCK/SCL
• Serial data (SDA) - RC4/SDI/SDA
The user must configure these pins as inputs or outputs
through the TRISC<4:3> bits.
FIGURE 15-7:
DS39564C-page 134
RC3/SCK/SCL
RC4/
SDI/
SDA
I
2
C Mode
Read
Shift
Clock
MSb
MSSP BLOCK DIAGRAM
(I
STOP bit Detect
2
2
Match Detect
SSPADD reg
SSPBUF reg
START and
SSPSR reg
C mode fully implements all
C MODE)
LSb
Write
(SSPSTAT reg)
Internal
Data Bus
S, P bits
Set, Reset
Addr Match
15.4.1
The MSSP module has six registers for I
These are:
• MSSP Control Register1 (SSPCON1)
• MSSP Control Register2 (SSPCON2)
• MSSP Status Register (SSPSTAT)
• Serial Receive/Transmit Buffer (SSPBUF)
• MSSP Shift Register (SSPSR) - Not directly
• MSSP Address Register (SSPADD)
SSPCON, SSPCON2 and SSPSTAT are the control
and status registers in I
SSPCON and SSPCON2 registers are readable and
writable. The lower 6 bits of the SSPSTAT are read
only. The upper two bits of the SSPSTAT are read/
write.
SSPSR is the shift register used for shifting data in or
out. SSPBUF is the buffer register to which data bytes
are written to or read from.
SSPADD register holds the slave device address
when the SSP is configured in I
the SSP is configured in Master mode, the lower
seven bits of SSPADD act as the baud rate generator
reload value.
In receive operations, SSPSR and SSPBUF together,
create a double buffered receiver. When SSPSR
receives a complete byte, it is transferred to SSPBUF
and the SSPIF interrupt is set.
During transmission, the SSPBUF is not double buff-
ered. A write to SSPBUF will write to both SSPBUF and
SSPSR.
accessible
REGISTERS
© 2006 Microchip Technology Inc.
2
C mode operation. The
2
C Slave mode. When
2
C operation.
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