UPD78F9221CS-CAC-A Renesas Electronics America, UPD78F9221CS-CAC-A Datasheet - Page 85
UPD78F9221CS-CAC-A
Manufacturer Part Number
UPD78F9221CS-CAC-A
Description
MCU 8BIT 2KB FLASH 20PIN
Manufacturer
Renesas Electronics America
Series
78K0S/Kx1+r
Datasheet
1.UPD78F9221MC-5A4-A.pdf
(418 pages)
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
-
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(3) External clock input circuit
Remark PCC:
If external clock input is selected by the option byte, the following is possible.
Figures 5-12 and 5-13 show the timing chart and status transition diagram of default start by external clock input.
High-speed operation
The accuracy of processing is improved as compared with high-speed internal oscillation (8 MHz (TYP.))
because an oscillation frequency of 2 to 10 MHz can be selected and an external clock with a small frequency
deviation can be supplied.
Improvement of expandability
If the external clock input circuit is selected as the oscillator, the X2 pin can be used as an I/O port pin. For
details, refer to CHAPTER 4 PORT FUNCTIONS.
PPCC: Preprocessor clock control register
Figure 5-11. Status Transition of Default Start by Crystal/Ceramic Oscillation
Processor clock control register
Interrupt
HALT
CHAPTER 5 CLOCK GENERATORS
oscillation stabilization
oscillation selected
Clock division ratio
instruction
Crystal/ceramic
variable during
power-on-clear
CPU operation
HALT
Wait for clock
by option byte
User’s Manual U16898EJ6V0UD
Reset by
application
Power
V
Start with PCC = 02H,
PPCC = 02H
instruction
DD
STOP
> 2.1 V (TYP.)
STOP
Interrupt
Reset signal
83
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