Buzzer Register (Bzcr); Figure 9.4-2 Buzzer Register (Bzcr); Table 9.4-1 Buzzer Register (Bzcr) Bits - Fujitsu F2MC-8L Series Hardware Manual

9.4.1

Buzzer Register (BZCR)

The buzzer register (BZCR) is used to select the buzzer output frequency and also to
enable buzzer output.
Buzzer Register (BZCR)
Address Bit 7
000F —
H
R/W : Readable and writable
— : Unused
X : Indeterminate
: Initial valuLLe
F : Main clock oscillation
CH
frequency
F : Subclock oscillation
CL
frequency

Table 9.4-1 Buzzer Register (BZCR) Bits

Bit 7
Bit 6
Bit 5
Bit 4
Bit 3

Figure 9.4-2 Buzzer Register (BZCR)

Bit 6 Bit 5 Bit 4 Bit 3
— — — —
BZ2 BZ1 BZ0
0 0
0 0
0 1
0 1
1 0
1 0
1 1
1 1
Bit
Unused bits
Bit 2 Bit 1 Bit 0
BZ2 BZ1 BZ0
R/W R/W R/W
Buzzer selection bits (for F
General-purpose port output pin(P37)or remotely
0
controled transmit frequency output pin(RCO)
1
0
Timebase timer output
1
Used as buzzer output
0
pin(BZ)
1
0 Watch prescaler output
1
• The read value is indeterminate.
• Writing to these bits has no effect on the operation.
9.4 Buzzer Output Register
Initial value
XXXXX000
B
= 4.2 MHz, F = 32 kHz)
CH CL
F /2
CH
F /2
CH
F /2
CH
F /2
CH
F /2
CL
F /2
CL
F /2
CL
Function
12
11
10
9
5
4
3
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