Buzzer Register (Bzcr) - Fujitsu F2MC-8L F202RA Hardware Manual

15.4

Buzzer Register (BZCR)

The buzzer register (BZCR) is used to select an output frequency of the buzzer and also
serves as the buzzer output enable.
■
Buzzer Register (BZCR)
Address bit7
0018
H
R/W
: Readable/Writable
: Unused
: Initial value
: Oscillation frequency
F
CH
Figure 15.4-1 Buzzer Register (BZCR)
bit6 bit5 bit4 bit3
BZ2
0
0
0
0
bit2 bit1 bit0 Initial value
BZ2 BZ1 BZ0 ----- 000
R/W R/W R/W
Buzzer selection bits (F
BZ1 BZ0
Works as a general-purpose output port (P37)
0 0
or the 12-bit PPG output (PPG).
Outputs F
0 1
1 Outputs F
0
1
Outputs F
1
1 Outputs F
0
0
1 1
0
1 1
0
1 1
1
CHAPTER 15 BUZZER OUTPUT
B
: 12.5 MHz)
CH
13
/2 (1.526 kHz) to the BZ pin.
CH
/2 (3.052 kHz) to the BZ pin.
12
CH
11
/2 (6.104 kHz) to the BZ pin.
CH
/2 10 (12.21 kHz) to the BZ pin.
CH
343