M30263F6AFP#U3 Renesas Electronics America, M30263F6AFP#U3 Datasheet - Page 65

• Manufacturer Part Number: M30263F6AFP#U3
• Description: MCU 3/5V 48K I TEMP PB-FREE 42-S
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/Tiny/26r

Specifications of M30263F6AFP#U3

• Core Processor: M16C/60
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: I²C, IEBus, SIO, UART/USART
• Peripherals: DMA, PWM, Voltage Detect, WDT
• Number Of I /o: 33
• Program Memory Size: 48KB (48K x 8)
• Program Memory Type: FLASH
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 10x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 42-SSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

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e
E
7.2 Sub Clock
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J
1
Figure 7.2.1. Examples of Sub Clock Connection Circuit
0
6
2
The sub clock is generated by the sub clock oscillation circuit. This clock is used as the clock source for the
CPU clock, as well as the timer A and timer B count sources.
The sub clock oscillator circuit is configured by connecting a crystal resonator between the X
pins. The sub clock oscillator circuit contains a feedback resistor, which is disconnected from the oscillator
circuit during stop mode in order to reduce the amount of power consumed in the chip. The sub clock
oscillator circuit may also be configured by feeding an externally generated clock to the X
7.2.1 shows the examples of sub clock connection circuit.
After reset, the sub clock is turned off. At this time, the feedback resistor is disconnected from the oscillator
circuit.
To use the sub clock for the CPU clock, set the CM07 bit in the CM0 register to “1 ” (sub clock) after the sub
clock becomes oscillating stably.
During stop mode, all clocks including the sub clock are turned off. Refer to 7.6 Power Control.
9
C
0 .
B
2 /
0
0
2
6
0
F
A
2
e
0 -
b
G
1 .
2
o r
(Built-in Feedback Resistor)
0
, 5
0
u
2
p
0
(
0
M
7
NOTE:
1
6
MCU
1. Place a damping resistor if required. Resistance values vary depending on the oscillator setting.
C
page 46
X
Use values recommended by each oscillator manufacturer.
Place a feedback resistor between X
placing the resistor externally.
2 /
COUT
X
V
6
CIN
SS
, A
M
f o
1
Oscillator
6
3
R
C
2
C
9
2 /
d
(1)
6
, B
M
1
C
C
6
COUT
CIN
C
2 /
6
CIN
) T
and X
(Built-in Feedback Resistor)
COUT
if the oscillator manufacturer recommends
MCU
X
C OUT
X
C IN
Open
V
V
CC
SS
External Clock
7. Clock Generation Circuit
CIN
CIN
and X
pin. Figure
COUT