UPD78F9221CS-CAC-A Renesas Electronics America, UPD78F9221CS-CAC-A Datasheet - Page 238

• Manufacturer Part Number: UPD78F9221CS-CAC-A
• Description: MCU 8BIT 2KB FLASH 20PIN
• Manufacturer: Renesas Electronics America
• Series: 78K0S/Kx1+r

Specifications of UPD78F9221CS-CAC-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: 2KB (2K x 8)
• Program Memory Type: FLASH
• Ram Size: 128 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: -

13.2 Standby Function Operation
13.2.1 HALT mode
Note “Cannot be stopped” or “Stopped by software” is selected for low-speed internal oscillator by the option byte
236
Item
System clock
CPU
Port (latch)
16-bit timer/event counter 00
8-bit timer 80
8-bit timer
H1
Watchdog
timer
A/D converter
Serial interface UART6
Power-on-clear circuit
Low-voltage detector
External interrupt
(1) HALT mode
(for the option byte, see CHAPTER 17 OPTION BYTE).
The HALT mode is set by executing the HALT instruction.
The operating statuses in the HALT mode are shown below.
Caution Because an interrupt request signal is used to clear the standby mode, if there is an interrupt
Sets count clock to f
Sets count clock to f
System clock selected as
operating clock
“Low-speed internal oscillation
clock” selected as operating
clock
source with the interrupt request flag set and the interrupt mask flag clear, the standby mode
is immediately cleared if set.
Setting of HALT Mode
XP
RL
/2
to f
Table 13-2. Operating Statuses in HALT Mode
7
XP
/2
12
CHAPTER 13 STANDBY FUNCTION
Clock supply to CPU is stopped.
Operation stops.
Holds status before HALT mode was set.
Operable
Operable
Operable
Operable
Setting prohibited
Operable (Operation
continues.)
Operable
Operable
Always operates.
Operable
Operable
Oscillator Cannot Be
User’s Manual U16898EJ6V0UD
Low-Speed Internal
Stopped
Note
Operation stops.
When Low-Speed Internal
Operable
Operation stops.
Oscillation Continues
Low-Speed Internal Oscillator Can Be Stopped
Operation stops.
When Low-Speed Internal
Oscillation Stops
Note