73s1209f68im Maxim Integrated Products, Inc., 73s1209f68im Datasheet - Page 37
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73s1209f68im
Manufacturer Part Number
73s1209f68im
Description
Self-contained Pinpad, Smart Card Reader Ic Uart To Iso7816 / Emv Bridge Ic
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
1.73S1209F68IM.pdf
(123 pages)
- Current page: 37 of 123
- Download datasheet (2Mb)
DS_1209F_004
1.7.3.4
The 73S1209F contains special interrupt logic to allow INT0 to wake up the CPU from a power down
(CPU STOP) state. See the
1.7.3.5
All interrupt sources are combined in groups, as shown in Table 27.
Each group of interrupt sources can be programmed individually to one of four priority levels by setting or
clearing one bit in the special function register
are received simultaneously, an internal polling sequence as per Table 31 determines which request is
serviced first.
IEN enable bits must be set to permit any of these interrupts to occur. Likewise, each interrupt has its
own flag bit that is set by the interrupt hardware.
Interrupt Priority 0 Register (IP0): 0xA9
Note: WDTS is not used for interrupt controls.
Rev. 1.2
Enable Bit
EX0
EX1
EX2
EX3
EX4
EX5
EX6
Group
Power Down Interrupt Logic
Interrupt Priority Level Structure
0
1
2
3
4
5
MSB
–
Description
Enable external interrupt 0
Enable external interrupt 1
Enable external interrupt 2
Enable external interrupt 3
Enable external interrupt 4
Enable external interrupt 5
Enable external interrupt 6
Serial channel 0 interrupt
External interrupt 0
External interrupt 1
Timer 0 interrupt
Timer 1 interrupt
WDTS
Power Control Modes
Table 26: Control Bits for External Interrupts
–
IP0.5
Table 27: Priority Level Groups
Table 28: The IP0 Register
0x00
IP0.4
IP0
Serial channel 1 interrupt
and one in IP1. If requests of the same priority level
section for details.
IP0.3
Flag Bit
IEX2
IEX3
IEX4
IEX5
IEX6
IE0
IE1
–
–
–
–
–
IP0.2
Description
External interrupt 0 flag
External interrupt 1 flag
External interrupt 2 flag
External interrupt 3 flag
External interrupt 4 flag
External interrupt 5 flag
External interrupt 6 flag
IP0.1
External interrupt 2
External interrupt 3
External interrupt 4
External interrupt 5
External interrupt 6
73S1209F Data Sheet
IP0.0
LSB
37
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