UPD78F1146AGB-GAH-AX Renesas Electronics America, UPD78F1146AGB-GAH-AX Datasheet - Page 156

• Manufacturer Part Number: UPD78F1146AGB-GAH-AX
• Description: MCU 16BIT 78K0R/KX3 64-LQFP
• Manufacturer: Renesas Electronics America
• Series: 78K0R/Kx3r

Specifications of UPD78F1146AGB-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: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 12K 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: -

(8) Internal high-speed oscillator trimming register (HIOTRM)
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This register is used to adjust the accuracy of the internal high-speed oscillator.
With self-measurement of the internal high-speed oscillator frequency via a subsystem clock using a crystal
resonator, a timer using high-accuracy external clock input (real-time counter or timer array unit), and so on, the
register can adjust the accuracy.
HIOTRM can be set by an 8-bit memory manipulation instruction.
Reset signal generation sets this register to 10H.
Caution The frequency will vary if the temperature and V
Moreover, if the HIOTRM register is set to any value other than the initial value (10H), the
oscillation accuracy of the internal high-speed oscillation clock may exceed 8 MHz±5%,
depending on the subsequent temperature and V
When the temperature and V
or before the frequency accuracy is required.
CHAPTER 5 CLOCK GENERATOR
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User’s Manual U17854EJ9V0UD
voltage change, accuracy adjustment must be executed regularly
DD
DD
pin voltage change after accuracy adjustment.
voltage change, or HIOTRM register setting.