UPD78F0513AGA-GAM-AX Renesas Electronics America, UPD78F0513AGA-GAM-AX Datasheet - Page 394

• Manufacturer Part Number: UPD78F0513AGA-GAM-AX
• Description: MCU 8BIT 48-LQFP
• Manufacturer: Renesas Electronics America
• Series: 78K0/Kx2r

Specifications of UPD78F0513AGA-GAM-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: 41
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: FLASH
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

78K0/Kx2
10.4 Watch Timer Operations
10.4.1 Watch timer operation
hardware clock or subsystem clock.
operation starts. When these bits are cleared to 0, the 5-bit counter is cleared and the count operation stops.
clearing WTM1 to 0. In this case, however, the 11-bit prescaler is not cleared. Therefore, an error up to 2
occurs in the first overflow (INTWT) after zero-second start.
Remarks 1. f
10.4.2 Interval timer operation
of the preset count value.
stops.
Remarks 1. f
R01UH0008EJ0401 Rev.4.01
Jul 15, 2010
The watch timer generates an interrupt request signal (INTWT) at a specific time interval by using the peripheral
When bit 0 (WTM0) and bit 1 (WTM1) of the watch timer operation mode register (WTM) are set to 1, the count
When the interval timer is simultaneously operated, zero-second start can be achieved only for the watch timer by
The interrupt request is generated at the following time intervals.
The watch timer operates as interval timer which generates interrupt request signals (INTWTI) repeatedly at an interval
The interval time can be selected with bits 4 to 6 (WTM4 to WTM6) of the watch timer operation mode register (WTM).
When bit 0 (WTM0) of the WTM is set to 1, the count operation starts. When this bit is set to 0, the count operation
WTM6
WTM3
0
0
1
1
0
0
0
0
1
1
1
1
2. f
3. f
2. f
3. f
WTM5
WTM2
0
0
1
1
0
0
1
1
0
1
0
1
W
PRS
SUB
W
PRS
SUB
:
:
: Peripheral hardware clock frequency
: Subsystem clock frequency
: Peripheral hardware clock frequency
: Subsystem clock frequency
Watch timer clock frequency (f
Watch timer clock frequency (f
WTM4
Interrupt Time
2
2
2
2
14
13
5
4
/f
/f
0
1
0
1
0
1
0
1
Selection
/f
/f
W
W
W
W
2
2
2
2
2
2
2
2
Interval Time
4
5
6
7
8
9
10
11
/f
/f
/f
/f
/f
/f
/f
/f
W
W
W
W
W
W
W
W
When Operated at
f
0.5 s
0.25 s
977
488
SUB
(WTM7 = 1)
= 32.768 kHz
μ
μ
s
s
Table 10-4. Watch Timer Interrupt Time
Table 10-5. Interval Timer Interval Time
kHz (WTM7 = 1)
488
977
1.95 ms
3.91 ms
7.81 ms
15.6 ms
31.3 ms
62.5 ms
When Operated
at f
SUB
μ
μ
s
s
= 32.768
PRS
PRS
When Operated at
1.05 s
0.52 s
2.05 ms
1.02 ms
/2
/2
f
(WTM7 = 0)
PRS
7
7
or f
or f
= 2 MHz
When Operated
1.02 ms
2.05 ms
4.10 ms
8.20 ms
16.4 ms
32.8 ms
65.5 ms
131.1 ms
at f
SUB
SUB
(WTM7 = 0)
PRS
)
)
= 2 MHz
When Operated at
0.419 s
0.210 s
819
410
f
(WTM7 = 0)
PRS
μ
μ
s
s
When Operated
410
820
1.64 ms
3.28 ms
6.55 ms
13.1 ms
26.2 ms
52.4 ms
at f
= 5 MHz
(WTM7 = 0)
PRS
μ
μ
s
s
= 5 MHz
CHAPTER 10 WATCH TIMER
When Operated at
0.210 s
0.105 s
410
205
f
PRS
(WTM7 = 0)
at f
When Operated
205
410
820
1.64 ms
3.28 ms
6.55 ms
13.1 ms
26.2 ms
μ
μ
(WTM7 = 0)
s
s
= 10 MHz
PRS
μ
μ
μ
s
s
s
= 10 MHz
When Operated at
0.105 s
52.5 ms
205
102
at f
f
When Operated
102
205
410
820
1.64 ms
3.28 ms
6.55 ms
13.1 ms
PRS
(WTM7 = 0)
9
(WTM7 = 0)
× 1/f
μ
μ
PRS
= 20 MHz
s
s
μ
μ
μ
μ
s
s
s
s
= 20 MHz
W
seconds
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