UPD78F1144AGB-GAH-AX Renesas Electronics America, UPD78F1144AGB-GAH-AX Datasheet - Page 162

• Manufacturer Part Number: UPD78F1144AGB-GAH-AX
• Description: MCU 16BIT 78K0R/KX3 64-LQFP
• Manufacturer: Renesas Electronics America
• Series: 78K0R/Kx3r

Specifications of UPD78F1144AGB-GAH-AX

• Core Processor: 78K/0R
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: 3-Wire SIO, I²C, LIN, UART/USART
• Peripherals: DMA, LVD, POR, PWM, WDT
• Number Of I /o: 50
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 1.8 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: Lead free / RoHS Compliant
• Eeprom Size: -

5.5 Clock Generator Operation
mode (see Figure 5-1).
78K0R/KE3, thus enabling the following.
(1) Enhancement of security function
(2) Improvement of performance
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The clock generator generates the following clocks and controls the operation modes of the CPU, such as standby
• Main system clock f
• Subsystem clock f
• Internal low-speed oscillation clock f
• CPU/peripheral hardware clock f
The CPU starts operation when the internal high-speed oscillator starts outputting after a reset release in the
When the X1 clock is set as the CPU clock by the default setting, the device cannot operate if the X1 clock is
damaged or badly connected and therefore does not operate after reset is released. However, the start clock of
the CPU is the internal high-speed oscillation clock, so the device can be started by the internal high-speed
oscillation clock after a reset release. As a result, reset sources can be detected by software and the minimum
amount of safety processing can be done during anomalies to ensure that the system terminates safely.
Because the CPU can be started without waiting for the X1 clock oscillation stabilization time, the total
performance can be improved.
When the power supply voltage is turned on, the clock generator operation is shown in Figure 5-13 and Figure 5-
14.
• High-speed system clock f
• Internal high-speed oscillation clock f
X1 clock f
External main system clock f
X
SUB
MAIN
MX
CLK
CHAPTER 5 CLOCK GENERATOR
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User’s Manual U17854EJ9V0UD
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