HD404848 Просмотр технического описания (PDF) - Renesas Electronics

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производитель

HD404848

4-Bit Single-Chip Microcomputer

Renesas Electronics 

HD404849 Series

AC Characteristics (HD404848/HD4048412/HD404849: VCC = 2.7 to 6.0 V, GND = 0 V, Ta = –20°C to

+75°C; HD4074849: VCC = 2.7 to 5.5 V, GND = 0 V, Ta = –20°C to +75°C, unless otherwise specified)

Item

Symbol Pin(s)

Min Typ Max Unit Test Condition Note

Clock oscillation

f OSC

OSC1, OSC2 0.4 —

4.5 MHz 1/4 division

1

frequency

X1, X2

— 32.768 — kHz —

Instruction cycle time tcyc

—

t subcyc

—

0.89 —

10 µs

— 244.14 — µs 32-kHz oscillator, 2

1/8 division

— 122.07 — µs 32-kHz oscillator, 2

1/4 division

Oscillation stabilization tRC

OSC1, OSC2 — —

7.5 ms

3

time

(ceramic oscillator)

Oscillation stabilization tRC

OSC1, OSC2 — —

30 ms —

3

time

(crystal oscillator)

External clock high

t CPH

width

X1, X2

OSC1

——

105 —

2

s

Ta = –10°C to+60°C 3

— ns fOSC = 4 MHz

4

External clock low width tCPL

OSC1

105 —

— ns fOSC = 4 MHz

4

External clock rise time tCPr

OSC1

——

20 ns fOSC = 4 MHz

4

External clock fall time tCPf

OSC1

——

20 ns fOSC = 4 MHz

4

INT0–INT3, EVNB,

t IH

INT0–INT3,

2—

—

tcyc/ —

5

EVND high widths

EVNB, EVND

t subcyc

INT0–INT3, EVNB,

t IL

INT0–INT3,

2—

—

tcyc/ —

5

EVND low widths

EVNB, EVND

t subcyc

RESET low width

t RSTL

RESET

2—

—

t cyc

—

6

STOPC low width

t STPL

STOPC

1—

—

t RC

—

7

RESET rise time

t RSTr

RESET

——

20 ms —

6

STOPC rise time

t STPr

STOPC

——

20 ms —

7

Input capacitance

Cin

All pins except — —

D11

15 pF f = 1 MHz, Vin = 0 V

D11

——

180 pF f = 1 MHz, Vin = 0 V 8

Notes: 1. When the subsystem oscillator (32.768-kHz crystal oscillator) is used, fOSC must operate under

one of the following conditions: 0.4 MHz ≤ fOSC ≤ 1.0 MHz or 1.6 MHz ≤ fOSC ≤ 4.5 MHz. Set bit 1

of the system clock select register (SSR: $029) to 0 for the former, and 1 for the latter.

2. For the HD404848, HD4048412, and HD404849, instructions can be executed during subactive

mode if VCC = 2.2 V to 6.0 V.

3. The oscillation stabilization time is defined as the time required for the oscillator to stabilize in the

following three cases:

• After VCC reaches 2.7 V at power-on

• After RESET input goes low when stop mode is cancelled

119

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