Feature Integration Technology Inc.
Fintek
F15353
6.5.2 Selected Frequency Steady Interrupt Output
Set the status register_2 and the INT1# or INT2# pin output mode is set to the selected frequency steady
interrupt output. The set clock output follows the frequency data set in INT1# register_1 or register_2.
Ex:
32kE=0, INT1ME=0, INT1AE=Don’t care (0 or 1) INT2ME=0 INT2AE=Don’t care (0 or 1)
Change by the program
INT1FE/INT2FE
Free run output starts
INT1# pin/INT2# pin
OFF
Figure 4: Timing of Selected Frequency Steady Interrupt Output
6.5.3 Per-minute edge interrupt output
If INT1# or INT2# pin output mode is set as the per-minute edge interrupt, INT1# or INT2# will pull low as the first
minute carry is performed. Since the output is held, to rewrite 32kE, INT1AE, INT1ME, and INT1FE of the
register_2 to “0” sets the output to high (OFF state) in INT1# pin output mode. IN INT2# mode, to rewrite INT2AE,
INT2ME, and INT2FE of the register_2 to “0” or INT2AE of status register_2 to “0” will release the output from
low to high.
Ex:
32kE=0, INT1ME=0, INT1AE=Don’t care (0 or 1) INT2ME=0 INT2AE=Don’t care (0 or 1)
Change by the program
INT1ME/INT2ME
Minute Carrying Processing
INT1# pin/INT2# pin
OFF
If the period is less than
123us, "L" signal is output
Figure 5: Timing of Per-minute Edge Interrupt Output
6.5.4 Per-minute steady interrupt output1
V0.12P
15
FINTEK [ FEATURE INTEGRATION TECHNOLOGY INC. ]
