ISD91200 Series Technical Reference Manual
Release Date: Sep 16, 2019
- 117 -
Revision 2.4
[19:18]
FLASHEN
Flash ROM Control Enable/Disable
Bit [19]: for Stop mode operation
Bit [18]: for Sleep mode operation
1: Turn off flash
0: Normal
Note: It takes 10us to turn on the flash to normal
[17]
LIRCDPDEN
OSC10k Enabled Control
Determines whether OSC10k is enabled in DPD mode. If OSC10k is disabled,
device cannot wake from DPD with SELWKTMR delay.
0 = enabled.
1 = disabled.
[16]
WKPINEN
Wakeup Pin Enabled Control
Determines whether WAKEUP pin is enabled in DPD mode.
0 = enabled.
1 = disabled.
[15]
Reserved
Reserved.
[14]
IOSTATE
‘1’: IO held from SPD
‘0’: IO released.
[13]
RELEASEIO
Write ‘1’ to this bit to release IO state after exiting SPD if hold request was made
with the HOLD_IO bit.
[12]
HOLDIO
When entering SPD mode, IO state is automatically held
If this bit is set to ‘1’
then this sate upon resuming full power mode will be hold until the RELEASE_IO bit
is written ‘1’
[11]
DPDEN
Deep Power Down (DPD) Bit
Set to ‘1’ and issue WFI/WFE instruction to enter DPD mode.
[10]
SPDEN
Standby Power Down (SPD) Bit
Set to ‘1’ and issue WFI/WFE instruction to enter SPD mode.
[9]
STOPEN
Stop
Set to ‘1’ and issue WFI/WFE instruction to enter STOP mode.
[8:5]
Reserved
Reserved.
[4]
HXTEN
HXT Oscillator Enable Bit
0 = disable (default).
1 = enable.
[3]
LIRCEN
LIRC Oscillator Enable Bit
0 = disable.
1 = enable (default).
[2]
HIRCEN
HIRC Oscillator Enable Bit
0 = disable.
1 = enable (default).
[1]
LXTEN
External 32.768 KHz Crystal Enable Bit
0 = disable (default).
1 = enable.
[0]
Reserved
Reserved.