UPD78F0500AMC-CAB-AX Renesas Electronics America, UPD78F0500AMC-CAB-AX Datasheet - Page 247

• Manufacturer Part Number: UPD78F0500AMC-CAB-AX
• Description: MCU 8BIT 30SSOP
• Manufacturer: Renesas Electronics America
• Series: 78K0/Kx2r

Specifications of UPD78F0500AMC-CAB-AX

• Core Processor: 78K/0
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: 3-Wire SIO, I²C, LIN, UART/USART
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 23
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 512 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
R01UH0008EJ0401 Rev.4.01
Jul 15, 2010
Subsystem clock (f
(when XT1 oscillation
<1> When the power is turned on, an internal reset signal is generated by the power-on-clear (POC) circuit.
Notes 1.
Cautions 1. A voltage oscillation stabilization time of 1.93 to 5.39 ms is required after the supply voltage
<2> When the power supply voltage exceeds 2.7 V (TYP.), the reset is released and the internal high-speed oscillator
<3> After the reset is released and reset processing is performed, the CPU starts operation on the internal high-speed
<4> Set the start of oscillation of the X1 or XT1 clock via software (see (1) in 6.6.1 Example of controlling high-
<5> When switching the CPU clock to the X1 or XT1 clock, wait for the clock oscillation to stabilize, and then set
oscillation clock (f
Internal reset signal
(when X1 oscillation
Internal high-speed
system clock (f
Power supply
voltage (V
selected)
automatically starts oscillation.
oscillation clock.
speed system clock and (1) in 6.6.3 Example of controlling subsystem clock).
switching via software (see (3) in 6.6.1 Example of controlling high-speed system clock and (3) in 6.6.3
Example of controlling subsystem clock).
High-speed
2.
CPU clock
selected)
2. It is not necessary to wait for the oscillation stabilization time when an external clock input from
When releasing a reset (above figure) or releasing STOP mode while the CPU is operating on the internal
high-speed oscillation clock, confirm the oscillation stabilization time for the X1 clock using the oscillation
stabilization time counter status register (OSTC). If the CPU operates on the high-speed system clock (X1
oscillation), set the oscillation stabilization time when releasing STOP mode using the oscillation
stabilization time select register (OSTS).
The 78K0/KB2 is not provided with a subsystem clock.
Note 2
DD
SUB
0 V
RH
XH
Figure 6-16. Clock Generator Operation When Power Supply Voltage Is Turned On
)
)
)
)
reaches 1.59 V (TYP.). If the supply voltage rises from 1.59 V (TYP.) to 2.7 V (TYP.) within 1.93 ms,
the power supply oscillation stabilization time of 0 to 5.39 ms is automatically generated before
reset processing.
the EXCLK and EXCLKS pins is used.
<1>
(When 2.7 V/1.59 V POC Mode Is Set (Option Byte: POCMODE = 1))
Waiting for oscillation accuracy
stabilization (86 to 361 s)
2.7 V (TYP.)
Starting X1 oscillation
is set by software.
<3>
<2>
Starting XT1 oscillation
is set by software.
Reset processing
<4>
(11 to 45 s)
oscillation stabilization time:
Internal high-speed
oscillation clock
2
<4>
11
/f
X
X1 clock
to 2
16
/f
X
Note 1
<5>
CHAPTER 6 CLOCK GENERATOR
High-speed system clock
Switched by
software
<5>
Subsystem clock
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