PIC18F2320-I/SO Microchip Technology Inc., PIC18F2320-I/SO Datasheet - Page 211

• Manufacturer Part Number: PIC18F2320-I/SO
• Description: Microcontroller; 8 KB Flash; 512 RAM; 256 EEPROM; 25 I/O; 28-Pin-SOIC
• Manufacturer: Microchip Technology Inc.

Specifications of PIC18F2320-I/SO

• A/d Inputs: 10-Channel, 10-Bit
• Comparators: 2
• Cpu Speed: 10 MIPS
• Eeprom Memory: 256 Bytes
• Input Output: 25
• Interface: I2C/SPI/USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 28-pin SOIC
• Programmable Memory: 8K Bytes
• Ram Size: 512 Bytes
• Speed: 20 MHz
• Timers: 1-8-bit, 3-16-bit
• Voltage, Range: 2-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

18.5
Synchronous Slave mode differs from the Master mode
in the fact that the shift clock is supplied externally at
the RC6/TX/CK pin (instead of being supplied internally
in Master mode). This allows the device to transfer or
receive data while in any power managed mode. Slave
mode is entered by clearing bit, CSRC (TXSTA<7>).
18.5.1
The operation of the Synchronous Master and Slave
modes are identical, except in the case of the Sleep
mode.
If two words are written to the TXREG and then the
SLEEP instruction is executed, the following will occur:
a)
b)
c)
d)
e)
TABLE 18-10: REGISTERS ASSOCIATED WITH SYNCHRONOUS SLAVE TRANSMISSION
 2003 Microchip Technology Inc.
INTCON
PIR1
PIE1
IPR1
RCSTA
TXREG
TXSTA
SPBRG
Legend: x = unknown, - = unimplemented, read as ‘0’. Shaded cells are not used for synchronous slave transmission.
Note 1:
Name
The first word will immediately transfer to the
TSR register and transmit.
The second word will remain in TXREG register.
Flag bit TXIF will not be set.
When the first word has been shifted out of TSR,
the TXREG register will transfer the second
word to the TSR and flag bit TXIF will now be
set.
If enable bit TXIE is set, the interrupt will wake
the chip from Sleep. If the global interrupt is
enabled, the program will branch to the interrupt
vector.
USART Synchronous Slave Mode
The PSPIF, PSPIE and PSPIP bits are reserved on the PIC18F2X20 devices; always maintain these bits clear.
USART Transmit Register
Baud Rate Generator Register
USART SYNCHRONOUS SLAVE
TRANSMIT
PSPIF
PSPIE
PSPIP
CSRC
SPEN
GIEH
Bit 7
GIE/
(1)
(1)
(1)
PEIE/
GIEL
ADIF
ADIE
ADIP
Bit 6
RX9
TX9
TMR0IE INT0IE
SREN
TXEN
RCIF
RCIE
RCIP
Bit 5
CREN ADDEN
SYNC
Bit 4
TXIF
TXIE
TXIP
PIC18F2220/2320/4220/4320
SSPIF
SSPIE
SSPIP
RBIE
Bit 3
—
TMR0IF
CCP1IE TMR2IE TMR1IE 0000 0000 0000 0000
CCP1IP TMR2IP TMR1IP 1111 1111 1111 1111
CCP1IF TMR2IF TMR1IF 0000 0000 0000 0000
BRGH
FERR
Bit 2
To set up a Synchronous Slave Transmission:
1.
2.
3.
4.
5.
6.
7.
8.
Enable the synchronous slave serial port by
setting bits SYNC and SPEN and clearing bit
CSRC.
Clear bits CREN and SREN.
If interrupts are desired, set enable bit TXIE.
If 9-bit transmission is desired, set bit TX9.
Enable the transmission by setting enable bit
TXEN.
If 9-bit transmission is selected, the ninth bit
should be loaded in bit TX9D.
Start transmission by loading data to the TXREG
register.
If using interrupts, ensure that the GIE and PEIE
bits in the INTCON register (INTCON<7:6>) are
set.
INT0IF
OERR
TRMT
Bit 1
RX9D
TX9D
RBIF
Bit 0
0000 000x 0000 000u
0000 -00x 0000 -00x
0000 0000 0000 0000
0000 -010 0000 -010
0000 0000 0000 0000
POR, BOR
Value on
DS39599C-page 209
Value on
all other
Resets