UPD78F9222MC-5A4-A Renesas Electronics America, UPD78F9222MC-5A4-A Datasheet - Page 152

• Manufacturer Part Number: UPD78F9222MC-5A4-A
• Description: MCU 8BIT 4KB FLASH 20PIN
• Manufacturer: Renesas Electronics America
• Series: 78K0S/Kx1+r

Specifications of UPD78F9222MC-5A4-A

• Core Processor: 78K0S
• Core Size: 8-Bit
• Speed: 10MHz
• Connectivity: LIN, UART/USART
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 15
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2 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: -

9.1
signal is generated.
For details of RESF, see CHAPTER 14 RESET FUNCTION.
low-speed internal oscillator as shown in Table 9-2.
150
The watchdog timer is used to detect an inadvertent program loop. If a program loop is detected, an internal reset
When a reset occurs due to the watchdog timer, bit 4 (WDTRF) of the reset control flag register (RESF) is set to 1.
The operation mode of the watchdog timer (WDT) is switched according to the option byte setting of the on-chip
Functions of Watchdog Timer
Remarks 1. f
2
2
2
2
2
2
2
2
During Low-Speed Internal oscillation Clock Operation
11
12
13
14
15
16
17
18
/f
/f
/f
/f
/f
/f
/f
/f
RL
RL
RL
RL
RL
RL
RL
RL
(4.27 ms)
(8.53 ms)
(17.07 ms)
(34.13 ms)
(68.27 ms)
(136.53 ms)
(273.07 ms)
(546.13 ms)
2. f
3. Figures in parentheses apply to operation at f
RL
X
: Oscillation frequency of system clock
: Low-speed internal oscillation clock oscillation frequency
Table 9-1. Loop Detection Time of Watchdog Timer
CHAPTER 9 WATCHDOG TIMER
User’s Manual U16898EJ6V0UD
Loop Detection Time
2
2
2
2
2
2
2
2
13
14
15
16
17
18
19
20
/f
/f
/f
/f
/f
/f
/f
/f
X
X
X
X
X
X
X
X
(819.2 s)
(1.64 ms)
(3.28 ms)
(6.55 ms)
(13.11 ms)
(26.21 ms)
(52.43 ms)
(104.86 ms)
RL
During System Clock Operation
= 480 kHz (MAX.), f
X
= 10 MHz.