UPD78F0138HGK-9ET-A Renesas Electronics America, UPD78F0138HGK-9ET-A Datasheet - Page 124

• Manufacturer Part Number: UPD78F0138HGK-9ET-A
• Description: MCU 8BIT 60K FLASH 64TQFP
• Manufacturer: Renesas Electronics America
• Series: 78K0/Kx1+r

Specifications of UPD78F0138HGK-9ET-A

• Core Processor: 78K/0
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: 3-Wire SIO, LIN, UART/USART
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 42
• Program Memory Size: 60KB (60K x 8)
• Program Memory Type: FLASH
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 2.5 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

5.4.3 When subsystem clock is not used
connect the XT1 and XT2 pins as follows.
5.4.4 Internal oscillator
oscillation clock always oscillates after RESET release (240 kHz (TYP.)).
5.4.5 Prescaler
speed system clock is selected as the clock to be supplied to the CPU.
122
XT1: Connect directly to EV
If it is not necessary to use the subsystem clock for low power consumption operations and watch operations,
XT2: Leave open
Note When the subsystem clock is not used, the on-chip feedback resistor must be set after a reset is released
Remark The feedback resistor is required to control the bias point of the oscillation waveform so that the bias
Internal oscillator is incorporated in the 78K0/KE1+.
“Can be stopped by software” or “Cannot be stopped” can be selected using the option byte. The internal
The prescaler generates various clocks by dividing the high-speed system clock oscillator output when the high-
Caution When the internal oscillation clock is selected as the clock supplied to the CPU, the prescaler
so that it is not used (bit 6 (FRC) of processor clock control register (PCC) = 1).
point is in the middle of the power supply voltage.
generates various clocks by dividing the internal oscillator output (f
SS
Figure 5-11. Subsystem Clock Feedback Resistor
or V
SS
Feedback resistor
XT1
Note
CHAPTER 5 CLOCK GENERATOR
User’s Manual U16899EJ3V0UD
P-ch
FRC
XT2
X
= 240 kHz (TYP.)).