NEC mPD784225 Series User Manual page 357

(2) Port 2 mode register (PM2)
This register sets port 2 I/O in 1-bit units.
When the P24/BUZ pin is used as the buzzer output function, set the output latches of PM24 and P24 to 0.
PM2 is set by a 1-bit or 8-bit memory manipulation instruction.
RESET input sets PM2 to FFH.
Address: 0FF22H After reset: FFH
Symbol 7
PM2 PM27
CHAPTER 20 BUZZER OUTPUT FUNCTIONS
Figure 20-3. Format of Port 2 Mode Register (PM2)
R/W
6 5 4
PM26 PM25 PM24
PM2n P2n pin I/O mode selection (n = 0 to 7)
0 Output mode (output buffer on)
1 Input mode (output buffer off)
User's Manual U12697EJ3V0UM
3 2 1
PM23 PM22 PM21
0
PM20
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