UPD78F9221CS-CAC-A Renesas Electronics America, UPD78F9221CS-CAC-A Datasheet - Page 267

• 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: -

17.1 Functions of Option Byte
when starting after a reset, the option byte is automatically referenced, and settings for the specified functions are
performed. When using the product, be sure to set the following functions by using the option byte.
The address 0080H of the flash memory of the 78K0S/KA1+ is an option byte area. When power is supplied or
(1) Selection of system clock source
(2) Low-speed internal oscillation clock oscillation
(3) Control of RESET pin
(4) Oscillation stabilization time on power application or after reset release
0080H
0000H
High-speed internal oscillation clock
Crystal/ceramic oscillation clock
External clock input
Cannot be stopped.
Can be stopped by software.
Used as RESET pin
2
2
2
2
RESET pin is used as an input port pin (P34) (refer to 17.3 Caution When the RESET Pin Is Used as an
Input-Only Port Pin (P34)).
10
12
15
17
/f
/f
/f
/f
X
X
X
X
Flash memory
Figure 17-1. Positioning of Option Byte
CHAPTER 17 OPTION BYTE
User’s Manual U16898EJ6V0UD
Option byte
1
OSTS1
DEF
OSTS0
DEF
1
RMCE
OSCSEL1
OSCSEL0 LIOCP
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