UPD78F9212CS-CAB-A Renesas Electronics America, UPD78F9212CS-CAB-A Datasheet - Page 79

• Manufacturer Part Number: UPD78F9212CS-CAB-A
• Description: MCU 8BIT 4KB FLASH 16PIN
• Manufacturer: Renesas Electronics America
• Series: 78K0S/Kx1+r

Specifications of UPD78F9212CS-CAB-A

• Core Processor: 78K0S
• Core Size: 8-Bit
• Speed: 10MHz
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 13
• Program Memory Size: 4KB (4K 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: -
• Connectivity: -

CPU clock (f
(2) Low-speed internal oscillation mode register (LSRCM)
The fastest instruction of the 78K0S/KY1+ is executed in two CPU clocks. Therefore, the relationship between the
This register is used to select the operation mode of the low-speed internal oscillator (240 kHz (TYP.)).
This register is valid when it is specified by the option byte that the low-speed internal oscillator can be stopped
by software. If it is specified by the option byte that the low-speed internal oscillator cannot be stopped by
software, setting of this register is invalid, and the low-speed internal oscillator continues oscillating. In addition,
the source clock of WDT is fixed to the low-speed internal oscillator.
WATCHDOG TIMER.
LSRCM can be set by using a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation sets LSRCM to 00H.
Address: FF58H, After reset: 00H, R/W
Symbol
LSRCM
Note The CPU clock (high-speed internal oscillation clock, crystal/ceramic oscillation clock, or external clock
f
f
f
f
f
X
X
X
X
X
/2
/2
/2
/2
2
3
4
CPU Clock (f
CPU
input) is selected by the option byte.
Table 5-2. Relationship between CPU Clock and Minimum Instruction Execution Time
) and the minimum instruction execution time is as shown in Table 5-2.
LSRSTOP
Figure 5-4. Format of Low-Speed internal oscillation Mode Register (LSRCM)
7
0
0
1
CPU
)
Note
Low-speed internal oscillates
Low-speed internal oscillator stops
6
0
0.25 s
0.5 s
1.0 s
2.0 s
4.0 s
High-speed internal oscillation clock
CHAPTER 5 CLOCK GENERATORS
(at 8.0 MHz (TYP.))
5
0
User’s Manual U16994EJ6V0UD
Oscillation/stop of low-speed internal oscillator
Minimum Instruction Execution Time: 2/f
4
0
3
0
0.2 s
0.4 s
0.8 s
1.6 s
3.2 s
or external clock input (at 10.0 MHz)
Crystal/ceramic oscillation clock
2
0
For details, refer to CHAPTER 8
CPU
1
0
LSRSTOP
<0>
77