UPD78F1146AGB-GAH-AX Renesas Electronics America, UPD78F1146AGB-GAH-AX Datasheet - Page 180

• 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: -

Note When changing the subsystem clock to another clock, the clock must be set back to the clock before setting the
178
Subsystem
clock
Before Change
Note
subsystem clock. For example, when changing the clock to the X1 clock after having changed the internal
high-speed oscillation clock to the subsystem clock, the clock is changed in the order of the subsystem clock,
the internal high-speed oscillation clock, and the X1 clock.
CPU Clock
Internal high-
speed oscillation
clock
X1 clock
External main
system clock
After Change
Oscillation of internal high-speed oscillator
and selection of internal high-speed
oscillation clock as main system clock
• HIOSTOP = 0, MCS = 0
Stabilization of X1 oscillation and selection
of high-speed system clock as main system
clock
• OSCSEL = 1, EXCLK = 0, MSTOP = 0
• After elapse of oscillation stabilization time
• MCS = 1
Enabling input of external clock from EXCLK
pin and selection of high-speed system clock
as main system clock
• OSCSEL = 1, EXCLK = 1, MSTOP = 0
• MCS = 1
Table 5-5. Changing CPU Clock (2/2)
CHAPTER 5 CLOCK GENERATOR
Condition Before Change
User’s Manual U17854EJ9V0UD
XT1 oscillation can be stopped (XTSTOP =
1)
Processing After Change