3819 datasheet(103/218 Pages) RENESAS

103 / 218 page

2. APPLICATION

MITSUBISHI MICROCOMPUTER

3819 Group

2.3 Serial I/O

3819 Group USER’S MANUAL

Fig. 2.3.7 Structure of Serial I/O 3 control register

Fig. 2.3.8 Structure of Interrupt request register 1

Interrupt request register 1

b7 b6 b5 b4 b3 b2 b1 b0

Function

At reset

Interrupt request reigster 1 (IREQ1) [Address:3C16]

Name

INT0 interrupt request bit

INT1/ZCR interrupt request bit

0 : No interrupt request

1 : Interrupt request

0 : No interrupt request

1 : Interrupt request

0 : No interrupt request

1 : Interrupt request

0 : No interrupt request

1 : Interrupt request

Serial I/O 1 interrupt request

bit

Serial I/O automatic transfer

interrupt request bit

Serial I/O 2 interrupt request

bit

Timer 1 interrupt request bit

0 : No interrupt request

1 : Interrupt request

Serial I/O 3 interrupt request

bit

Timer 2 interrupt request bit

0 : No interrupt request

1 : Interrupt request

0 : No interrupt request

1 : Interrupt request

0 : No interrupt request

1 : Interrupt request

T "0" is set by software, but not "1."

INT2 interrupt request bit

Remote control/counter

overflow interrupt request bit

Serial I/O 3 control register

b7 b6 b5 b4 b3 b2 b1 b0

Function

R W

Serial I/O 3 control register (SIO3CON) [Address:1E16]

Name

Internal synchronous clock

selection bits

Synchronous clock selection

bit

000 : f(XIN)/8 or f(XCIN)/8

001 : f(XIN)/16 or f(XCIN)/16

010 : f(XIN)/32 or f(XCIN)/32

011 : f(XIN)/64 or f(XCIN)/64

110 : f(XIN)/128 or f(XCIN)/128

111 : f(XIN)/256 or f(XCIN)/256

0 : External clock

1 : Internal clock

b2 b1b0

Serial I/O 3 port selection bit

(P55,P56 )

Transfer direction selection

bit

0 : LSB first

1 : MSB first

SRDY3 output selection bit

(P57)

0 : I/O port

1 : SRDY3 signal pin

0 : I/O port

1 : SOUT3, SCLK3 signal pins

P55/SOUT3 P-channel output

disable bit

0 : CMOS output (in output mode)

1 : N-channel open-drain output

(in output mode)

At reset

3819 Datasheet(PDF) 103 Page - Renesas Technology Corp

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