M16C6K9 Datasheet, PDF (150/292 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

M16C/6K9 Group
LPC Bus Interface
Input buffer full flag0
IBF0
Rising edge
detection circuit
One shot pulse
generator
Input buffer full flag1
IBF1
Rising edge
detection circuit
One shot pulse
generator
IBF1INT
Input buffer full flag2
IBF2
Rising edge
detection circuit
One shot pulse
generator
IBF2INT
Input buffer full flag3
IBF3
Rising edge
detection circuit
One shot pulse
generator
IBF3INT
Output buffer full flag0 OBF0
Output buffer full flag1 OBF1
Output buffer full flag2 OBF2
Output buffer full flag3 OBF3
OBE0 Rising edge
detection circuit
OBE1 Rising edge
detection circuit
OBE2 Rising edge
detection circuit
OBE3 Rising edge
detection circuit
One shot pulse
generator
One shot pulse
generator
One shot pulse
generator
One shot pulse
generator
OBE
Input Buffer Full0 interrupt request signal
(IBF0 interrupt request)
b7,b6
00
10
11
b7,b6
01
b7,b6
00
01
11
b7,b6
10
b7,b6
00
01
10
b7,b6
11
DBBCON0
bit 7,6
Input Buffer Full1/output buffer empty interrupt
request signal (IBF1/OBE interrupt request)
Input Buffer Full2/output buffer empty interrupt
request signal (IBF2/OBE interrupt request)
Input Buffer Full3/output buffer empty interrupt
request signal (IBF3/OBE interrupt request)
IBF0
IBF0 interrupt request
IBF1
IBF1INT
IBF2
IBF2INT
IBF3
IBF3INT
OBF0(OBE0)
OBF1(OBE1)
OBF2(OBE2)
OBF3(OBE3)
OBE
(Example) Data bus buffer control register 0 bit 7=1, bit 6=1
IBF1/OBE interrupt request
IBF2/OBE interrupt request
IBF3/OBE interrupt request
Fig.GF-1 Interrupt, request, circuit of Data Bus Buffer
Rev.1.00 Jun 06, 2003 page 150 of 290