UPD78F9234MC-5A4-A Renesas Electronics America, UPD78F9234MC-5A4-A Datasheet - Page 240

• Manufacturer Part Number: UPD78F9234MC-5A4-A
• Description: MCU 8BIT 8KB FLASH 30PIN
• Manufacturer: Renesas Electronics America
• Series: 78K0S/Kx1+r

Specifications of UPD78F9234MC-5A4-A

• Core Processor: 78K0S
• Core Size: 8-Bit
• Speed: 10MHz
• Connectivity: LIN, UART/USART
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 24
• Program Memory Size: 8KB (8K 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: -

14.1 Standby Function and Configuration
14.1.1 Standby function
available.
238
Notes 1.
Caution The LSRSTOP setting is valid only when “Can be stopped by software” is set for the low-speed
Remark LSRSTOP: Bit 0 of the low-speed internal oscillation mode register (LSRCM)
The standby function is designed to reduce the operating current of the system. The following two modes are
(1) HALT mode
Operation Mode
Reset
STOP
HALT
HALT instruction execution sets the HALT mode. In the HALT mode, the CPU operation clock is stopped.
Oscillation of the system clock oscillator continues. If the low-speed internal oscillator is operating before the
HALT mode is set, oscillation of the clock of the low-speed internal oscillator continues (refer to Table 14-1.
Oscillation of the low-speed internal oscillation clock (whether it cannot be stopped or can be stopped by
software) is set by the option byte). In this mode, the operating current is not decreased as much as in the
STOP mode, but the HALT mode is effective for restarting operation immediately upon interrupt request
generation and frequently carrying out intermittent operations.
2.
3.
internal oscillator by the option byte.
When “Cannot be stopped” is selected for low-speed internal oscillator by the option byte.
When it is selected that the low-speed internal oscillator “can be stopped by software”, oscillation of the
low-speed internal oscillator can be stopped by LSRSTOP.
If the operating clock of the watchdog timer is the low-speed internal oscillation clock, the watchdog
timer is stopped.
Status
Table 14-1. Relationship Between Operation Clocks in Each Operation Status
Stopped
Oscillating
Note 1
CHAPTER 14 STANDBY FUNCTION
Low-Speed Internal Oscillator
Oscillating
LSRSTOP = 0
User’s Manual U17446EJ5V0UD
Note 3
Note 2
Stopped
LSRSTOP = 1
Stopped
Oscillating
System Clock
Stopped
Oscillating
Clock Supplied to
Peripheral
Hardware