MB90335_07 Datasheet, PDF (53/92 Pages) Fujitsu Component Limited. – 16-bit Microcontroller

MB90335 Series
11. DTP/external interrupt circuit
DTP (Data Transfer Peripheral)/external interrupt circuit detects the interrupt request input from the external
interrupt input terminal INT7 to INT0, and outputs the interrupt request.
• DTP/external interrupt circuit function
The DTP/external interrupt function outputs an interrupt request upon detection of the edge or level signal input
to the external interrupt input pins (INT7 to INT0).
If CPU accept the interrupt request, and if the extended intelligent I/O service (EI²OS) is enabled, branches to
the interrupt handling routine after completing the automatic data transfer (DTP function) performed by EI²OS.
And if EI²OS is disabled, it branches to the interrupt handling routine without activating the automatic data transfer
(DTP function) performed by EI²OS.
• Feature of DTP/external interrupt circuit
External interrupt
DTP function
Input pin
8 channels (P60/INT0, P61/INT1, P62/INT2/SIN, P63/INT3/SOT, P64/INT4/SCK,
P65/INT5/PWC, P66/INT6/SCL0, P67/INT7/SDA0)
Interrupt source
The detection level or the type of the edge for each terminals can be set in the
request level setting register (ELVR)
Input of “H” level/ “L” level/rising edge/falling edge.
Interrupt number
#18 (12H) , #20 (14H) , #22 (16H) , #24 (18H)
Interrupt control
Enabling/Prohibit the interrupt request output using the DTP/interrupt enable
register (ENIR)
Interrupt flag
Holding the interrupt source using the DTP/interrupt cause register (EIRR)
Process setting
Prohibit EI²OS (ICR: ISE=“0”)
Enable EI²OS (ICR: ISE=“1”)
Process
Branched to the interrupt handling
routine
After an automatic data transfer by EI²OS,
Branched to the interrupt handling routine
• Register list
DTP/Interrupt enable register (ENIR)
Address : 00003CH
7
6
5
EN7 EN6 EN5
(R/W) (R/W) (R/W)
DTP/Interrupt source register (EIRR)
Address : 00003DH
15
14
13
ER7 ER6 ER5
(R/W) (R/W) (R/W)
Request level setting register (ELVR)
Address : 00003EH
7
6
5
LB3 LA3 LB2
(R/W) (R/W) (R/W)
4
EN4
(R/W)
12
ER4
(R/W)
4
LA2
(R/W)
3
EN3
(R/W)
11
ER3
(R/W)
3
LB1
(R/W)
2
EN2
(R/W)
1
EN1
(R/W)
10
ER2
(R/W)
9
ER1
(R/W)
2
LA1
(R/W)
1
LB0
(R/W)
0
EN0
(R/W)
8
ER0
(R/W)
0
LA0
(R/W)
Address : 00003FH
15
LB7
(R/W)
14
LA7
(R/W)
13
LB6
(R/W)
12
LA6
(R/W)
11
LB5
(R/W)
10
LA5
(R/W)
9
LB4
(R/W)
8
LA4
(R/W)
Initial Value
00000000B
Initial Value
00000000B
Initial Value
00000000B
Initial Value
00000000B
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