Panasonic MN101C77C, F77G user manual Setup Example, Uart Interface Transmision Reception Setup

Chapter 11 Serial Interface 0, 1

11-3-8 Setup Example

„Transmission / Reception Setup

The setup example at UART transmission / reception with serial 0 is shown. Table 11-3-33 shows the conditions at transmission / reception.

Table 11-3-33 UART Interface Transmision Reception Setup

Setup item	set to
TXD / RXD pin	independent (with 2 channels)
Frame mode specification	8 bits + 2 stop bits
First transfer bit	MSB
Clock source	timer 5
Used pin	A (Port 0)
TXD0A / RX0DA pin type	Nch open-drain
Pull-up resistor of TXD0A pin	added
Parity bit add / check	"0"add / check
Serial interface 0 transmission	Enable.
complete interrupt
Serial interface 0 reception	Enable.
complete interrupt

An example setup procedure, with a description of each step is shown below.

	Setup Procedure		Description
(1)	Select prescaler operation.	(1) Set the PSCEN flag of the PSCMD register to
	PSCMD (x'3F6F')		"1" to select prescaler operation.
	bp0 : PSCEN = 1
(2) Select the clock source.		(2)	Set the bp2 - 0 flag of the SC0CKS
	SC0CKS (x'3F97')		register to "110" to select timer 4 output as a
	bp2-0 : SC0PSC2-0 = 110		clock source.
(3)	Select the used pin.	(3)	Set the SC0SEL flag of the SC0ODC
	SC0ODC(x'3F96')		register to "0" to set I/O used pin to A (port 0).
	bp7 : SC0SEL = 0
(4)	Control the pin type.	(4)	Set the SC0ODC0 flag of the SC0ODC
	SC0ODC(x'3F96')		register to "1" to select N-ch open drain for the
	bp0 : SC0ODC0 = 1		TXD0A pin. Set the P0PLU3 flag of the P0PLU
	P0PLU (x'3F40')		register to "1" to add pull-up resistor.
	bp3 : P0PLU3 = 1
(5)	Control the pin direction.	(5)	Set the P0DIR4-3 flag of the port 0 pin direction
	P0DIR(x'3F30')		control register (P0DIR) to "01" to set P03 to
	bp4-3 : P0DIR4-3 = 01		output mode, and P04 to input mode.

XI - 58 Operation