UPD78F1144AGB-GAH-AX Renesas Electronics America, UPD78F1144AGB-GAH-AX Datasheet - Page 281

• Manufacturer Part Number: UPD78F1144AGB-GAH-AX
• Description: MCU 16BIT 78K0R/KX3 64-LQFP
• Manufacturer: Renesas Electronics America
• Series: 78K0R/Kx3r

Specifications of UPD78F1144AGB-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: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K 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: -

7.4.2 Shifting to STOP mode after starting operation
INTRTC interrupt has occurred.
• Checking by polling RWST to become 1, after setting RTCE to 1 and then setting RWAIT to 1. Afterward, setting
• Shifting to STOP mode when at least two subsystem clocks (f
Perform one of the following processing when shifting to STOP mode immediately after setting RTCE to 1.
However, after setting RTCE to 1, this processing is not required when shifting to STOP mode after the first
to 1 (see Figure 7-20, Example 1).
RWAIT to 0 and shifting to STOP mode after checking again by polling that RWST has become 0 (see Figure 7-
20, Example 2).
Waiting at least for 2
STOP mode
f
RTCE = 1
SUB
clocks
Figure 7-20. Procedure for Shifting to STOP Mode After Setting RTCE to 1
Example 1
Sets to counter operation
start
Shifts to STOP mode
CHAPTER 7 REAL-TIME COUNTER
User’s Manual U17854EJ9V0UD
No
No
SUB
RWST = 1 ?
RWST = 0 ?
STOP mode
) (about 62
RWAIT = 1
RWAIT = 0
RTCE = 1
Yes
Yes
μ
Example 2
s) have elapsed after setting RTCE
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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