Datasheet

DS_1215F_003 73S1215F Data Sheet
Rev. 1.4 29
External Interrupt Control Register (INT5Ctl): 0xFF94 Å 0x00
Table 15: The INT5Ctl Register
MSB LSB
PDMUX – RTCIEN RTCINT USBIEN USBINT KPIEN KPINT
Bit Symbol Function
INT5Ctl.7 PDMUX
When set = 1, enables interrupts from USB, RTC, 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 RTCIEN RTC interrupt enable.
INT5Ctl.4 RTCINT RTC interrupt flag.
INT5Ctl.3 USBIEN USB interrupt enable.
INT5Ctl.2 USBINT USB interrupt flag.
INT5Ctl.1 KPIEN Keypad interrupt enable.
INT5Ctl.0 KPINT Keypad interrupt flag.
Miscellaneous Control Register 0 (MISCtl0): 0xFFF1 Å 0x00
Table 16: 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 PCON register to stop the CPU core. The RTC will stay active if it is
set to operate from the 32kHz oscillator. 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.