UPD78F1146AGB-GAH-AX Renesas Electronics America, UPD78F1146AGB-GAH-AX Datasheet - Page 158

• 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: -

5.4 System Clock Oscillator
5.4.1 X1 oscillator
pins.
follows.
5.4.2 XT1 oscillator
156
The X1 oscillator oscillates with a crystal resonator or ceramic resonator (2 to 20 MHz) connected to the X1 and X2
An external clock can also be input. In this case, input the clock signal to the EXCLK pin.
To use the X1 oscillator, set bits 7 and 6 (EXCLK, OSCSEL) of the clock operation mode control register (CMC) as
• Crystal or ceramic oscillation: EXCLK, OSCSEL = 0, 1
• External clock input:
When the X1 oscillator is not used, set the input port mode (EXCLK, OSCSEL = 0, 0).
When the pins are not used as input port pins, either, see Table 2-2 Connection of Unused Pins.
Figure 5-10 shows an example of the external circuit of the X1 oscillator.
Cautions are listed on the next page.
The XT1 oscillator oscillates with a crystal resonator (standard: 32.768 kHz) connected to the XT1 and XT2 pins.
To use the XT1 oscillator, set bit 4 (OSCSELS) of the clock operation mode control register (CMC) to 1.
When the XT1 oscillator is not used, set the input port mode (OSCSELS = 0).
When the pins are not used as input port pins, either, see Table 2-2 Connection of Unused Pins.
Figure 5-11 shows an example of the external circuit of the XT1 oscillator.
Cautions are listed on the next page.
(a) Crystal or ceramic oscillation
Figure 5-11. Example of External Circuit of XT1 Oscillator (Crystal Oscillation)
Crystal resonator
or
ceramic resonator
Figure 5-10. Example of External Circuit of X1 Oscillator
EXCLK, OSCSEL = 1, 1
V
X1
X2
SS
CHAPTER 5 CLOCK GENERATOR
User’s Manual U17854EJ9V0UD
32.768
kHz
V
XT1
XT2
SS
External clock
(b) External clock
EXCLK