73s1210f68im Maxim Integrated Products, Inc., 73s1210f68im Datasheet - Page 68
73s1210f68im
Manufacturer Part Number
73s1210f68im
Description
Self-contained Smart Card Reader With Pinpad And Power Management
Manufacturer
Maxim Integrated Products, Inc.
Datasheet
1.73S1210F68IM.pdf
(126 pages)
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73S1210F Data Sheet
External Interrupt Control Register (INT5Ctl): 0xFF94 0x00
1.7.14 Emulator Port
The emulator port, consisting of the pins E_RST, E_TCLK and E_RXTX, provides control of the MPU
through an external in-circuit emulator. The E_TBUS[3:0] pins, together with the E_ISYNC/BRKRQ, add
trace capability to the emulator. The emulator port is compatible with the ADM51 emulators
manufactured by Signum Systems™.
The signals of the emulator port have weak pull-ups. Adding resistor footprints for signals E_RST,
E_TCLK and E_RXTX on the PCB is recommended. If necessary, adding 10kΩ pull-up resistors on
E_TCLK and E_RXTX and a 3kΩ on E_RST will help the emulator operate normally if a problem arises.
If code trace capability is needed on this interface, 20pF capacitors ( (to ground) need to be added to
allow the trace function capability to run properly. These capacitors should be attached to the TBUS0:3
and ISBR signals.
68
INT5Ctl.7
INT5Ctl.6
INT5Ctl.5
INT5Ctl.4
INT5Ctl.3
INT5Ctl.2
INT5Ctl.1
INT5Ctl.0
Bit
MSB
PDMUX
PDMUX
Symbol
KPIEN
KPINT
–
–
–
–
–
–
Power down multiplexer control.
Enables Keypad interrupt when set = 1.
This bit indicates the Keypad logic has set Key_Detect bit and a key
location may be read. Cleared on read of register.
Table 71: The INT5Ctl Register
–
–
–
Function
–
KPIEN
KPINT
LSB
DS_1210F_001
Rev. 1.4
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