UPD78F0550MA-FAA-AX Renesas Electronics America, UPD78F0550MA-FAA-AX Datasheet - Page 644

• Manufacturer Part Number: UPD78F0550MA-FAA-AX
• Description: MCU 8BIT 16-SSOP
• Manufacturer: Renesas Electronics America
• Series: 78K0/Kx2-Lr

Specifications of UPD78F0550MA-FAA-AX

• Package / Case: *
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Speed: 10MHz
• Number Of I /o: 12
• Core Processor: 78K/0
• Program Memory Type: FLASH
• Ram Size: 384 x 8
• Program Memory Size: 4KB (4K x 8)
• Data Converters: A/D 4x10b
• Oscillator Type: Internal
• Peripherals: LVD, POR, PWM, WDT
• Connectivity: I²C, LIN, UART/USART
• Core Size: 8-Bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

<R>
<R>
23.1 Regulator Overview
order to stabilize the regulator output voltage, connect the REGC pin to V
However, when using the STOP mode that has been entered since operation of the internal high-speed oscillation
clock and external main system clock, 0.47 F is recommended. Also, use a capacitor with good characteristics, since
it is used to stabilize internal voltage.
23.2 Registers Controlling Regulator
(1) Regulator mode control register (RMC)
644
Address: FF3DH
The 78K0/Kx2-L microcontrollers contain a circuit for operating the device with a constant voltage. At this time, in
The regulator output voltage is normally 2.4 V (TYP.), and in the low power consumption mode, 2.0 V (TYP.).
Symbol
RMC
Cautions 1. To change the RMC register setting value from 56H to 00H and use a CPU operating
This register sets the output voltage of the regulator.
RMC is set with an 8-bit memory manipulation instruction.
Reset input sets this register to 00H.
Other than
RMC[7:0]
above
56H
00H
2. When using the setting fixed to the low power consumption mode, the RMC register can
3. Flash memory can be rewritten at a power supply voltage of 2.6 V or less only during
After reset: 00H
7
frequency of 5 MHz or more, change the PCC and RCM registers when 10 s or more has
elapsed after the RMC register was set.
be used in the following cases.
<When the high-speed internal oscillation clock, external input clock, or subsystem clock
are selected for the CPU clock>
EEPROM emulation in low power consumption mode. A flash memory area that is written
or erased in low power consumption mode cannot be accessed in normal power mode.
<When X1 clock is selected as the CPU clock>
Figure 23-1. Format of Regulator Mode Control Register (RMC)
Fixed to low power consumption mode (2.0 V)
Switches normal power mode (2.4 V) and low power consumption mode (2.0 V) according to the
condition (refer to Table 23-1)
Setting prohibited
6
R/W
Preliminary User’s Manual U19111EJ2V1UD
CHAPTER 23 REGULATOR
5
Control of output voltage of regulator
4
3
SS
via a capacitor (0.47 to 1 F: target).
f
f
X
CPU
2
5 MHz and f
5 MHz
1
CPU
5 MHz
0