Holtek HT67F2350 Manual page 90

HXTC Register
Bit 7
Name —
R/W —
POR —
Bit 7~3 Unimplemented, read as "0"
Bit 2 HXTM: HXT mode selection
0: HXT frequency ≤ 10 MHz
1: HXT frequency > 10 MHz
This bit is used to select the HXT oscillator operating mode. Note that this bit must
be properly configured before the HXT is enabled. When the OSC1 and OSC2 pins
are enabled and the HXTEN bit is set to 1 to enable the HXT oscillator, it is invalid to
change the value of this bit. Otherwise, this bit value can be changed with no operation
on the HXT function.
Bit 1 HXTF: HXT oscillator stable flag
0: HXT unstable
1: HXT stable
This bit is used to indicate whether the HXT oscillator is stable or not. When the
HXTEN bit is set to 1 to enable the HXT oscillator, the HXTF bit will first be cleared
to 0 and then set to 1 after the HXT oscillator is stable.
Bit 0 HXTEN: HXT oscillator enable control
0: Disable
1: Enable
LXTC Register
Bit 7
Name —
R/W —
POR —
Bit 7~2 Unimplemented, read as "0"
Bit 1 LXTF: LXT oscillator stable flag
0: LXT unstable
1: LXT stable
This bit is used to indicate whether the LXT oscillator is stable or not. When the
LXTEN bit is set to 1 to enable the LXT oscillator, the LXTF bit will first be cleared
to 0 and then set to 1 after the LXT oscillator is stable.
LXTEN: LXT oscillator enable control
Bit 0
0: Disable
1: Enable
Rev. 1.60
Advanced A/D Flash MCU with LCD & EEPROM
6 5 4
— — —
— — —
— — —
6 5 4
— — —
— — —
— — —
90
HT67F2350/HT67F2360
HT67F2370/HT67F2390
3 2 1
— HXTM HXTF HXTEN
— R/W R
— 0 0
3 2 1
— — LXTF LXTEN
— — R
— — 0
May 16, 2019
0
R/W
0
0
R/W
0