UPD78F0890GK(A)-GAJ-AX NEC, UPD78F0890GK(A)-GAJ-AX Datasheet - Page 282

• Manufacturer Part Number: UPD78F0890GK(A)-GAJ-AX
• Description: 8BIT MCU, 128K FLASH, 7K RAM, LQFP
• Manufacturer: NEC

Specifications of UPD78F0890GK(A)-GAJ-AX

• Controller Family/series: UPD78F
• No. Of I/o's: 55
• Ram Memory Size: 7KB
• Cpu Speed: 20MHz
• No. Of Timers: 10
• No. Of Pwm: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 128KB
• Oscillator Type: External, Internal

282
Notes 1. If the peripheral hardware clock operates on the internal high-speed oscillation clock when 1.8 V ≤ V
Cautions 1. Set BCS1 and BCS0 when the buzzer output operation is stopped (BZOE = 0).
Remarks 1. f
Address: FF40H
Symbol
CKS
2. The PCL output clock prohibits settings if they exceed 10 MHz.
2. Set CCS3 to CCS0 while the clock output operation is stopped (CLOE = 0).
2. f
< 2.7 V, setting CCS3 = CCS2 = CCS1 = CCS0 = 0 (output clock of PCL: f
PRS
SUB
BZOE
CLOE
BZOE
BCS1
CCS3
<7>
: Peripheral hardware clock frequency
: Subsystem clock frequency
0
1
0
0
1
1
0
1
0
0
0
0
0
0
0
0
1
After reset: 00H
Figure 12-2. Format of Clock Output Selection Register (CKS)
CHAPTER 12 CLOCK OUTPUT/BUZZER OUTPUT CONTROLLER
Clock division circuit operation stopped. BUZ fixed to low level.
Clock division circuit operation enabled. BUZ output enabled.
Clock division circuit operation stopped. PCL fixed to low level.
Clock division circuit operation enabled. PCL output enabled.
BCS1
BCS0
CCS2
Other than above
6
0
1
0
1
0
0
0
0
1
1
1
1
0
R/W
f
f
f
f
PRS
PRS
PRS
PRS
BCS0
CCS1
/2
/2
/2
/2
User’s Manual U17554EJ4V0UD
5
0
0
1
1
0
0
1
1
0
10
11
12
13
BUZ output enable/disable specification
PCL output enable/disable specification
CLOE
CCS0
<4>
0
1
0
1
0
1
0
1
0
BUZ output clock selection
9.77 kHz
4.88 kHz
2.44 kHz
1.22 kHz
f
f
f
f
f
f
f
f
f
Setting prohibited
PRS
PRS
PRS
PRS
PRS
PRS
PRS
PRS
SUB
CCS3
Note1
/2
/2
/2
/2
/2
/2
/2
3
2
3
4
5
6
7
f
PRS
32.768 kHz
= 10 MHz
32.768 kHz
PCL output clock selection
f
SUB
−
CCS2
=
2
10 MHz
5 MHz
2.5 MHz
1.25 MHz
625 kHz
312.5 kHz
156.25 kHz
78.125 kHz
PRS
10 MHz
19.54 kHz
9.77 kHz
4.88 kHz
2.44 kHz
f
PRS
CCS1
) is prohibited.
=
1
f
PRS
= 20 MHz
−
Note
625 kHz
312.5 kHz
Setting
prohibited
10 MHz
5 MHz
2.5 MHz
1.25 MHz
156.25 kHz
20 MHz
f
CCS0
PRS
0
=
Note2
DD