UPD78F0413GA-GAM-AX NEC, UPD78F0413GA-GAM-AX Datasheet - Page 139

• Manufacturer Part Number: UPD78F0413GA-GAM-AX
• Description: 8BIT UC, 32K FLASH, 1KB RAM, LCD
• Manufacturer: NEC

Specifications of UPD78F0413GA-GAM-AX

• Controller Family/series: UPD78F
• No. Of I/o's: 30
• Ram Memory Size: 1024Byte
• Cpu Speed: 10MHz
• No. Of Timers: 8
• No. Of Pwm: RoHS Compliant
• Core Size: 8bit
• Program Memory Size: 32KB
• Oscillator Type: External, Internal

5.6.7 Condition before changing CPU clock and processing after changing CPU clock
Internal high-
speed oscillation
clock
X1 clock
External main
system clock
Internal high-
speed oscillation
clock
X1 clock
External main
system clock
XT1 clock
Before Change
Condition before changing the CPU clock and processing after changing the CPU clock are shown below.
CPU Clock
X1 clock
External main
system clock
Internal high-
speed oscillation
clock
XT1 clock
Internal high-
speed oscillation
clock
X1 clock
External main
system clock
After Change
Stabilization of X1 oscillation
Enabling input of external clock from EXCLK
pin
Oscillation of internal high-speed oscillator
Stabilization of XT1 oscillation
Oscillation of internal high-speed oscillator
and selection of internal high-speed
oscillation clock as main system clock
Stabilization of X1 oscillation and selection
of high-speed system clock as main system
clock
Enabling input of external clock from EXCLK
pin and selection of high-speed system
clock as main system clock
MSTOP = 0, OSCSEL = 1, EXCLK = 0
After elapse of oscillation stabilization time
MSTOP = 0, OSCSEL = 1, EXCLK = 1
RSTOP = 0
After elapse of oscillation stabilization time
RSTOP = 0, MCS = 0
MSTOP = 0, OSCSEL = 1, EXCLK = 0
After elapse of oscillation stabilization time
MCS = 1
MSTOP = 0, OSCSEL = 1, EXCLK = 1
MCS = 1
OSCSELS = 1
CHAPTER 5 CLOCK GENERATOR
Table 5-6. Changing CPU Clock
Condition Before Change
User’s Manual U18698EJ1V0UD
X1 oscillation can be stopped (MSTOP = 1).
External main system clock input can be
disabled (MSTOP = 1).
Operating current can be reduced by
stopping internal high-speed oscillator
(RSTOP = 1).
X1 oscillation can be stopped (MSTOP = 1).
External main system clock input can be
disabled (MSTOP = 1).
XT1 oscillation can be stopped (OSCSELS
= 0).
Internal high-speed oscillator can be
stopped (RSTOP = 1).
Processing After Change
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