UPD78F0551MA-FAA-AX Renesas Electronics America, UPD78F0551MA-FAA-AX Datasheet - Page 220

• Manufacturer Part Number: UPD78F0551MA-FAA-AX
• Description: MCU 8BIT 16-SSOP
• Manufacturer: Renesas Electronics America
• Series: 78K0/Kx2-Lr

Specifications of UPD78F0551MA-FAA-AX

• Core Processor: 78K/0
• Core Size: 8-Bit
• Speed: 10MHz
• Connectivity: I²C, LIN, UART/USART
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 9
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 1.8 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: -

78K0/Kx2-L
(3) Setting of operation mode for subsystem clock pin
R01UH0028EJ0400 Rev.4.00
Sep 27, 2010
Notes 1.
Caution
Remark
The operation mode for the subsystem clock pin
control register (PCC) and bits 5 and 4 (EXCLKS, OSCSELS) of the clock operation mode select register (OSCCTL)
in combination.
Note
f
f
f
f
f
f
XP
XP
XP
XP
XP
SUB
XTSTART
CPU Clock (f
/2
/2
/2
/2
/2
PCC
Bit 6
2
3
4
2.
78K0/KC2-L only
Note 2
0
0
0
0
1
Table 5-2. Relationship between CPU Clock and Minimum Instruction Execution Time
The main clock mode register (MCM) is used to set the main system clock supplied to CPU clock (high-
speed system clock/internal high-speed oscillation clock) (refer to Figures 5-5 and 5-6).
78K0/KC2-L only
Confirm that bit 5 (CLS) of the processor clock control register (PCC) is 0 (CPU is operating with
main system clock) when changing the current values of XTSTART, EXCLKS, and OSCSELS.
×: don’t care
Table 5-3. Setting of Operation Mode for Subsystem Clock Pin (78K0/KC2-L)
EXCLKS
CPU
Bit 5
)
0
0
1
1
×
OSCCTL
High-Speed System
At 10 MHz Operation
0.2
0.4
0.8
1.6
3.2
μ
μ
μ
μ
μ
OSCSELS
s
s
s
s
s
Clock
Bit 4
0
1
0
1
×
−
Note 1
Input port mode
XT1 oscillation mode
Input port mode
External clock input mode
XT1 oscillation mode
Subsystem Clock Pin
Operation Mode
0.25
0.5
1.0
2.0
4.0
Main System Clock
Internal High-Speed Oscillation Clock
At 8 MHz (TYP.)
Minimum Instruction Execution Time: 2/f
μ
μ
μ
μ
μ
s (TYP.)
s (TYP.)
s (TYP.)
s (TYP.)
Operation
s (TYP.)
Note
can be set by using bit 6 (XTSTART) of the processor clock
−
0.5
1.0
2.0
4.0
8.0
Input port
Crystal resonator connection
Input port
Input port
Crystal resonator connection
At 4 MHz (TYP.)
μ
μ
μ
μ
μ
s (TYP.)
s (TYP.)
s (TYP.)
s (TYP.)
s (TYP.)
Operation
P123/XT1 Pin
CHAPTER 5 CLOCK GENERATOR
Note 1
CPU
122.1
At 32.768 kHz Operation
Subsystem Clock
External clock input
P124/XT2/EXCLKS
μ
s
−
−
−
−
−
Pin
Note 2
206