PXD20RM Datasheet, PDF (1074/1628 Pages) Freescale Semiconductor, Inc – PXD20 Microcontroller

Table 29-4. Global Status Register (ME_GS) Field Descriptions (continued)
Field
Description
S_PDO
S_MVR
S_FLA
S_SSCLK1
Output power-down status — This bit specifies output power-down status of I/Os. This bit is
asserted whenever outputs of pads are forced to high impedance state or the pads power sequence
driver is switched off.
0 No automatic safe gating of I/Os used and pads power sequence driver is enabled
1 In SAFE/TEST modes, outputs of pads are forced to high impedance state and the pads power
sequence driver is disabled. The inputs are level unchanged. In STOP mode, only the pad power
sequence driver is disabled, but the state of the output remains functional. In STANDBY mode, the
power sequence driver and all pads except those mapped on wakeup lines are not powered and
therefore high impedance. Wakeup lines configuration remains unchanged
Main voltage regulator status
0 Main voltage regulator is not ready
1 Main voltage regulator is ready for use
Flash memory availability status
00 Flash memory is not available
01 Flash memory is in power-down mode
10 Flash memory is in low-power mode
11 Flash memory is in normal mode and available for use
Secondary system clock source 1 status
0 Secondary system clock source 1 is not stable
1 Secondary system clock source 1 is providing a stable clock
S_FMPLL1 secondary frequency modulated phase locked loop status
0 secondary frequency modulated phase locked loop is not stable
1 secondary frequency modulated phase locked loop is providing a stable clock
S_FMPLL0 primary frequency modulated phase locked loop status
0 primary frequency modulated phase locked loop is not stable
1 primary frequency modulated phase locked loop is providing a stable clock
S_FXOSC fast external crystal oscillator (4-16 MHz) status
0 fast external crystal oscillator (4-16 MHz) is not stable
1 fast external crystal oscillator (4-16 MHz) is providing a stable clock
S_FIRC
fast internal RC oscillator (16 MHz) status
0 fast internal RC oscillator (16 MHz) is not stable
1 fast internal RC oscillator (16 MHz) is providing a stable clock
S_SYSCLK
System clock switch status — These bits specify the system clock currently used by the system.
0000 16 MHz int. RC osc.
0001 reserved
0010 reserved
0011 div. 4-16 MHz ext. xtal osc.
0100 primary PLL/2
0101 reserved
0110 reserved
0111 reserved
1000 reserved
1001 reserved
1010 reserved
1011 reserved
1100 reserved
1101 reserved
1110 reserved
1111 system clock is disabled
29-16
PXD20 Microcontroller Reference Manual, Rev. 1
Preliminary—Subject to Change Without Notice
Freescale Semiconductor