DS_1209F_004
73S1209F Data Sheet
Rev. 1.2
29
External Interrupt Control Register (INT5Ctl): 0xFF94
Å
0x00
Table 14: The INT5Ctl Register
MSB LSB
PDMUX
– – – – –
KPIEN
KPINT
Bit Symbol
Function
INT5Ctl.7 PDMUX
When set=1, enables interrupts from Keypad (normally going to int5),
Smart Card interrupts (normally going to int4), or USR(7:0) pins (int0) to
cause interrupt on int0. The assertion of the interrupt to int0 is delayed by
512 MPU clocks to allow the analog circuits, including the clock system, to
stabilize. This bit must be set prior to asserting the PWRDN bit in order to
properly configure the interrupts that will wake up the circuit. This bit is
reset=0 when this register is read.
INT5Ctl.6 –
INT5Ctl.5 –
INT5Ctl.4 –
INT5Ctl.3 –
INT5Ctl.2 –
INT5Ctl.1
KPIEN
Keypad interrupt enable.
INT5Ctl.0
KPINT
Keypad interrupt flag.
Miscellaneous Control Register 0 (MISCtl0): 0xFFF1
Å
0x00
Table 15: The MISCtl0 Register
MSB LSB
PWRDN
– – – – –
SLPBK
SSEL
Bit Symbol
Function
MISCtl0.7 PWRDN
This bit sets the circuit into a low-power condition. All analog (high speed
oscillator and VCO/PLL) functions are disabled 32 MPU clock cycles after
this bit is set=1. This allows time for the next instruction to set the STOP bit
in the
register to stop the CPU core. The MPU is not operative in this
mode. When set, this bit overrides the individual control bits that otherwise
control power consumption.
MISCtl0.6 –
MISCtl0.5 –
MISCtl0.4 –
MISCtl0.3 –
MISCtl0.2 –
MISCtl0.1
SLPBK
UART loop back testing mode.
MISCtl0.0
SSEL
Serial port pins select.