UPD78F1009GB-GAH-AX Renesas Electronics America, UPD78F1009GB-GAH-AX Datasheet - Page 510

• Manufacturer Part Number: UPD78F1009GB-GAH-AX
• Description: MCU 16BIT 78K0R/KX3-L 64-LQFP
• Manufacturer: Renesas Electronics America
• Series: 78K0R/Kx3-Lr

Specifications of UPD78F1009GB-GAH-AX

• Core Processor: 78K/0R
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: 3-Wire SIO, I²C, LIN, UART/USART
• Peripherals: DMA, LVD, POR, PWM, WDT
• Number Of I /o: 50
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Ram Size: 3K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

78K0R/Kx3-L
9.4.2 Shifting to STOP mode after starting operation
INTRTC interrupt has occurred.
R01UH0106EJ0300 Rev.3.00
Oct 01, 2010
• Shifting to STOP mode when at least two subsystem clocks (f
• Checking by polling the RWST bit to become 1, after setting the RTCE bit to 1 and then setting the RWAIT bit to 1.
Perform one of the following processing when shifting to STOP mode immediately after setting the RTCE bit to 1.
However, after setting the RTCE bit to 1, this processing is not required when shifting to STOP mode after the first
Figure 9-19, Example 1).
Afterward, setting the RWAIT bit to 0 and shifting to STOP mode after checking again by polling that the RWST bit
has become 0 (see Figure 9-19, Example 2).
Waiting at least for 2
STOP mode
f
RTCE = 1
SUB
clocks
Figure 9-19. Procedure for Shifting to STOP Mode After Setting RTCE bit to 1
Example 1
Sets to counter operation
start
Shifts to STOP mode
No
No
SUB
RWST = 1 ?
RWST = 0 ?
STOP mode
RWAIT = 1
RWAIT = 0
RTCE = 1
) have elapsed after setting the RTCE bit to 1 (see
Yes
Yes
CHAPTER 9 REAL-TIME COUNTER
Example 2
Sets to counter operation
start
Checks the counter wait status
Sets the counter operation
Sets to stop the SEC to YEAR
counters, reads the counter
value, write mode
Shifts to STOP mode
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