UPD78F9221CS-CAC-A Renesas Electronics America, UPD78F9221CS-CAC-A Datasheet - Page 76

• 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: -

5.3
74
The clock generators are controlled by the following four registers.
(1) Processor clock control register (PCC) and preprocessor clock control register (PPCC)
Address: FFFBH After reset: 02H R/W
Symbol
PCC
Address: FFF3H After reset: 02H R/W
Symbol
PPCC
Processor clock control register (PCC)
Preprocessor clock control register (PPCC)
Low-speed internal oscillation mode register (LSRCM)
Oscillation stabilization time select register (OSTS)
Registers Controlling Clock Generators
These registers are used to specify the division ratio of the system clock.
PCC and PPCC are set by using a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation sets PCC and PPCC to 02H.
Notes 1. If PPCC = 01H, the clock (f
PPCC1
7
0
7
0
0
0
0
1
0
1
2. If PPCC = 02H, the clock (f
Figure 5-3. Format of Preprocessor Clock Control Register (PPCC)
Figure 5-2. Format of Processor Clock Control Register (PCC)
Other than above
PPCC0
6
0
6
0
0
1
0
0
1
0
CHAPTER 5 CLOCK GENERATORS
PCC1
5
0
5
0
0
0
1
0
1
1
User’s Manual U16898EJ6V0UD
XP
XP
f
f
f
f
f
f
Setting prohibited
X
X
X
X
X
X
/2
/2
/2
/2
/2
) supplied to the peripheral hardware is f
) supplied to the peripheral hardware is f
2
2 Note 2
3 Note 1
4 Note 2
Note 1
4
0
4
0
Selection of CPU clock (f
3
0
3
0
2
0
2
0
PPCC1
PCC1
CPU
1
1
)
X
X
/2.
/2
2
.
PPCC0
0
0
0