UPD78F0537DGA(T)-9EV-A NEC, UPD78F0537DGA(T)-9EV-A Datasheet - Page 310

• Manufacturer Part Number: UPD78F0537DGA(T)-9EV-A
• Description: 8BIT MCU, 128K FLASH, 7KB RAM, SMD
• Manufacturer: NEC

Specifications of UPD78F0537DGA(T)-9EV-A

• Controller Family/series: UPD78
• No. Of I/o's: 55
• Ram Memory Size: 7KB
• Cpu Speed: 20MHz
• No. Of Timers: 8
• No. Of Pwm: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 128KB
• Oscillator Type: External, Internal

310
(2) Port mode register 14 (PM14)
Cautions 1. Set BCS1 and BCS0 when the buzzer output operation is stopped (BZOE = 0).
Remarks 1. f
This register sets port 14 input/output in 1-bit units.
When using the P140/INTP6/PCL pin for clock output and the P141/INTP7/BUZ pin for buzzer output, clear
PM140 and PM141 and the output latches of P140 and P141 to 0.
PM14 is set by a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation sets PM14 to FFH.
2. Set CCS3 to CCS0 while the clock output operation is stopped (CLOE = 0).
2. f
Address: FF2EH
Symbol
PM14
PRS
SUB
: Peripheral hardware clock frequency
: Subsystem clock frequency
CHAPTER 12 CLOCK OUTPUT/BUZZER OUTPUT CONTROLLER
PM14n
7
1
0
1
Figure 12-3. Format of Port Mode Register 14 (PM14)
After reset: FFH
Output mode (output buffer on)
Input mode (output buffer off)
6
1
User’s Manual U17260EJ6V0UD
5
1
P14n pin I/O mode selection (n = 0, 1)
R/W
4
1
3
1
2
1
PM141
1
PM140
0