M30260F6AGP#U5A Renesas Electronics America, M30260F6AGP#U5A Datasheet - Page 100

• Manufacturer Part Number: M30260F6AGP#U5A
• Description: IC M16C MCU FLASH 48K 48LQFP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/Tiny/26r

Specifications of M30260F6AGP#U5A

• 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: 39
• 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 12x10b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 85°C
• Package / Case: 48-LQFP
• Cpu Family: R8C
• Device Core Size: 16b
• Frequency (max): 20MHz
• Interface Type: UART
• Total Internal Ram Size: 2KB
• # I/os (max): 39
• Number Of Timers - General Purpose: 8
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 3V
• On-chip Adc: 12-chx10-bit
• Instruction Set Architecture: CISC
• Operating Temp Range: -20C to 85C
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 48
• Package Type: LQFP
• Package: 48LQFP
• Family Name: R8C
• Maximum Speed: 20 MHz
• Operating Supply Voltage: 3.3|5 V
• Data Bus Width: 16 Bit
• Number Of Programmable I/os: 39
• Number Of Timers: 8
• For Use With: R0K33026AS000BE - KIT DEV EVALUATION M16C/26A
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Compliant

R
R
M
e
E
10.1 Count Source Protective Mode
. v
1
J
Figure 10.2 WDC Register and WDTS Register
0
6
In this mode, a on-chip oscillator clock is used for the watchdog timer count source. The watchdog timer
can be kept being clocked even when CPU clock stops as a result of run-away.
Before this mode can be used, the following register settings are required:
(1) Set the PRC1 bit in the PRCR register to “1” (enable writes to PM1 and PM2 registers).
(2) Set the PM12 bit in the PM1 register to “1” (reset when the watchdog timer underflows).
(3) Set the PM22 bit in the PM2 register to “1” (on-chip oscillator clock used for the watchdog timer count
source).
(4) Set the PRC1 bit in the PRCR register to “0” (disable writes to PM1 and PM2 registers).
(5) Write to the WDTS register (watchdog timer starts counting).
Setting the PM22 bit to “1” results in the following conditions
2
9
C
• The on-chip oscillator continues oscillating even if the CM21 bit in the CM2 register is set to "0" (main
• The on-chip oscillator starts oscillating, and the in-chip oscillator clock becomes the watchdog timer count
• The CM10 bit in the CM1 register is disabled against write. (Writing a “1” has no effect, nor is stop mode
• The watchdog timer does not stop when in wait mode.
0 .
B
clock or PLL clock) (system clock of count source selected by the CM21 bit is valid)
source.
entered.)
2 /
0
0
Watchdog Timer Start Register
b7
6
2
0
A
Watchdog Timer Control Register
F
b7
2
e
0 -
G
b
b6
0
1 .
2
o r
0
, 5
u
0
b5
0
p
2
0
(
Watchdog timer period =
b4
0
M
7
1
b3
6
C
page 81
2 /
b2
6
, A
b1
b0
M
b0
The watchdog timer is initialized and starts counting after a write instruction to
this register. The watchdog timer value is always initialized to “7FFF
regardless of whatever value is written.
f o
1
6
3
C
Bit Symbol
Symbol
WDTS
2
(b6-b5)
(b4-b0)
2 /
WDC7
9
6
Symbol
WDC
, B
M
1
6
Watchdog timer count (32768)
C
Reserved bit
Prescaler select bit
High-order bit of watchdog timer
on-chip oscillator clock
2 /
6
) T
Bit Name
Address
000F
Address
000E
16
16
Function
After Reset
Indeterminate
Set to “0”
0: Divided by 16
1: Divided by 128
After Reset
00XXXXXX
Function
2
16
”
10. Watchdog Timer
RW
RW
RO
RW
RW
WO