UPD78F0552MA-FAA-AX Renesas Electronics America, UPD78F0552MA-FAA-AX Datasheet - Page 236

• Manufacturer Part Number: UPD78F0552MA-FAA-AX
• Description: MCU 8BIT 16-SSOP
• Manufacturer: Renesas Electronics America
• Series: 78K0/Kx2-Lr

Specifications of UPD78F0552MA-FAA-AX

• Core Processor: 78K/0
• Core Size: 8-Bit
• Speed: 10MHz
• Connectivity: I²C, LIN, UART/USART
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 9
• Program Memory Size: 16KB (16K x 8)
• Program Memory Type: FLASH
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

78K0/Kx2-L
R01UH0028EJ0400 Rev.4.00
Sep 27, 2010
(4) Example of setting procedure when stopping the high-speed system clock
<2> Setting the high-speed system clock as the main system clock (MCM register)
<3> Setting the main system clock as the CPU clock and selecting the division ratio (PCC register)
The high-speed system clock can be stopped in the following two ways.
• Executing the STOP instruction and stopping the X1 oscillation (disabling clock input if the external clock is used)
• Setting MSTOP to 1 and stopping the X1 oscillation (disabling clock input if the external clock is used)
(a) To execute a STOP instruction
<1> Setting to stop peripheral hardware
<2> Setting the X1 clock oscillation stabilization time after standby release
<3> Executing the STOP instruction
When XSEL and MCM0 are set to 1, the high-speed system clock is supplied as the main system clock and
peripheral hardware clock.
Caution If the high-speed system clock is selected as the main system clock, a clock other than the
When CSS is cleared to 0, the main system clock is supplied to the CPU. To select the CPU clock division
ratio, use PCC0, PCC1, and PCC2.
XSEL
CSS
Stop peripheral hardware that cannot be used in the STOP mode (for peripheral hardware that cannot be
used in STOP mode, refer to CHAPTER 19 STANDBY FUNCTION).
When the CPU is operating on the X1 clock, set the value of the OSTS register before the STOP
instruction is executed.
When the STOP instruction is executed, the system is placed in the STOP mode and X1 oscillation is
stopped (the input of the external clock is disabled).
1
0
high-speed system clock cannot be set as the peripheral hardware clock.
MCM0
PCC2
1
0
0
0
0
1
Other than above
High-speed system clock (f
Selection of Main System Clock and Clock Supplied to Peripheral Hardware
PCC1
0
0
1
1
0
Main System Clock (f
PCC0
0
1
0
1
0
XH
f
f
f
f
f
Setting prohibited
XP
XP
XP
XP
XP
XP
)
)
/2 (default)
/2
/2
/2
2
3
4
CPU Clock (f
High-speed system clock (f
Peripheral Hardware Clock (f
CHAPTER 5 CLOCK GENERATOR
CPU
) Selection
XH
)
PRS
)
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