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CHAPTER 13 BUZZER OUTPUT CONTROL CIRCUIT
PM37
7
PM36
6
PM35 PM34
4
PM33
3
2
1
0
FF23H
Address
PM3
Symbol
PM32 PM31 PM30
5
FFH
After
Reset
R/W
R/W
PM3n
0
1
Output mode (output buffer ON)
Input mode (output buffer OFF)
P3n Pin Input/Output Mode Selection (n = 0 to 7)
(2) Port mode register 3 (PM3)
This register sets port 3 input/output in 1-bit units.
When using the P36/BUZ pin for buzzer output function, set PM36 and output latch of P36 to 0.
PM3 is set with a 1-bit or 8-bit memory manipulation instruction.
RESET input sets PM3 to FFH.
Figure 13-3. Port Mode Register 3 Format
Summary of Contents for PD78056F
Page 2: ...2 MEMO ...
Page 14: ...14 MEMO ...
Page 34: ...34 MEMO ...
Page 154: ...154 MEMO ...
Page 170: ...170 MEMO ...
Page 238: ...238 MEMO ...
Page 278: ...278 MEMO ...
Page 432: ...432 MEMO ...
Page 476: ...476 MEMO ...
Page 548: ...548 MEMO ...
Page 564: ...564 MEMO ...
Page 580: ...580 MEMO ...
Page 584: ...584 MEMO ...
Page 592: ...592 MEMO ...