R8C datasheet(61/106 Pages) RENESAS

61 / 106 page

R01DS0011EJ0100 Rev.1.00

Page 61 of 102

Dec 21, 2010

R8C/LA3A Group, R8C/LA5A Group, R8C/LA6A Group, R8C/LA8A Group

5. Electrical Characteristics

Note:

This enables the setting errors of bit rates such as 9600 bps and 38400 bps to be 0% when the serial interface is used in

UART mode.

Note:

Waiting time until the internal power supply generation circuit stabilizes during power-on.

Table 5.13

High-speed On-Chip Oscillator Circuit Characteristics

(VCC = 1.8 to 5.5 V and Topr =

−20 to 85 °C (N version)/ −40 to 85 °C (D version), unless

otherwise specified.)

Symbol

Parameter

Condition

Standard

Unit

Min.

Typ.

Max.

–

High-speed on-chip oscillator frequency after

reset

VCC = 1.8 V to 5.5 V

− 20 °C ≤ Topr ≤ 85 °C

19.2

20.8

MHz

VCC = 1.8 V to 5.5 V

− 40 °C ≤ Topr ≤ 85 °C

19.0

21.0

MHz

High-speed on-chip oscillator frequency when

the FRA4 register correction value is written into

the FRA1 register and the FRA5 register

correction value into the FRA3 register (1)

VCC = 1.8 V to 5.5 V

− 20 °C ≤ Topr ≤ 85 °C

17.694

18.432

19.169

MHz

VCC = 1.8 V to 5.5 V

− 40 °C ≤ Topr ≤ 85 °C

17.510

18.432

19.353

MHz

–

Oscillation stability time

–

µs

–

Self power consumption at oscillation

VCC = 5.0 V, Topr = 25

°C

–

530

–

µA

Table 5.14

Low-speed On-Chip Oscillator Circuit Characteristics

(VCC = 1.8 to 5.5 V and Topr =

−20 to 85 °C (N version)/ −40 to 85 °C (D version), unless

otherwise specified.)

Symbol

Parameter

Condition

Standard

Unit

Min.

Typ.

Max.

fOCO-S

Low-speed on-chip oscillator frequency

125

250

kHz

–

Oscillation stability time

–

µs

–

Self power consumption at oscillation

VCC = 5.0 V, Topr = 25

°C–

–

µA

fOCO-WDT

Low-speed on-chip oscillator frequency for the

watchdog timer

125

250

kHz

–

Oscillation stability time

–

µs

–

Self power consumption at oscillation

VCC = 5.0 V, Topr = 25

°C–

–

µA

Table 5.15

Power Supply Circuit Characteristics

(VCC = 1.8 to 5.5 V, VSS = 0 V, and Topr = 25

°C, unless otherwise specified.)

Symbol

Parameter

Condition

Standard

Unit

Min.

Typ.

Max.

td(P-R)

Time for internal power supply stabilization during

power-on (1)

–

2000

µs

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