UPD78F1000GB-GAF-AX Renesas Electronics America, UPD78F1000GB-GAF-AX Datasheet - Page 365

• Manufacturer Part Number: UPD78F1000GB-GAF-AX
• Description: MCU 16BIT 78K0R/KX3-L 44-LQFP
• Manufacturer: Renesas Electronics America
• Series: 78K0R/Kx3-Lr

Specifications of UPD78F1000GB-GAF-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: 33
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 10x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

78K0R/Kx3-L
7.4.3 Internal high-speed oscillator
controlled by bit 0 (HIOSTOP) of the clock operation status control register (CSC) and bit 0 (DSCON) of the 20 MHz
internal high-speed oscillation control register (DSCCTL).
Caution To use the 1, 8, or 20 MHz internal high-speed oscillation clock, use the option byte to set the frequency
7.4.4 Internal low-speed oscillator
clock cannot be used as the CPU clock.
(30 kHz (TYP.)) if the watchdog timer operation is enabled by the option byte.
timer operates, the internal low-speed oscillation clock does not stop, even in case of a program loop.
7.4.5 Prescaler
R01UH0106EJ0300 Rev.3.00
Oct 01, 2010
The internal high-speed oscillator is incorporated in the 78K0R/Kx3-L (1, 8 and 20 MHz (TYP.)). Oscillation can be
The internal low-speed oscillator is incorporated in the 78K0R/Kx3-L.
The internal low-speed oscillation clock is used only as the watchdog timer clock. The internal low-speed oscillation
After a reset release, the internal low-speed oscillator automatically starts oscillation, and the watchdog timer is driven
The internal low-speed oscillator continues oscillation except when the watchdog timer stops. When the watchdog
The prescaler generates a CPU/peripheral hardware clock by dividing the main system clock and subsystem clock.
in advance (for details, see CHAPTER 25 OPTION BYTE).
automatically starts oscillating after reset release. (If 8 MHz or 20 MHz is selected by using the option
byte, the microcontroller operates using the 8 MHz internal high-speed oscillator.) To use the 20 MHz
internal high-speed oscillator to operate the microcontroller, oscillation is started by setting bit 0
(DSCON) of the DSCCTL register to 1 with V
DD
≥ 2.7 V.
Also, the internal high-speed oscillator
CHAPTER 7 CLOCK GENERATOR
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