DS2251T(1995) 데이터 시트보기 (PDF) - Dallas Semiconductor -> Maxim Integrated

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DS2251T
(Rev.:1995)

128K Soft Microcontroller Module

Dallas Semiconductor -> Maxim Integrated 

DS2251T

RPC TIMING MODE 16 (cont’d)

DMA

DACK

RD

WR

DATA

DRQ

65

66

VALID

67

68

65

66

VALID

68

NOTES:

1. All voltages are referenced to ground.

2. Maximum operating ICC is measured with all output pins disconnected; XTAL1 driven with tCLKR,

tCLKF=10 ns, VIL = 0.5V; XTAL2 disconnected; RST = PORT0 = VCC.

3. Idle mode IIDLE is measured with all output pins disconnected; XTAL1 driven with tCLKR, tCLKF = 10 ns,

VIL = 0.5V; XTAL2 disconnected; PORT0 = VCC, RST = VSS.

4. Stop mode ISTOP is measured with all output pins disconnected; PORT0 = VCC; XTAL2 not connected;

RST = XTAL1 = VSS.

5. Pin capacitance is measured with a test frequency – 1 MHz, tA = 25°C.

6. Crystal start–up time is the time required to get the mass of the crystal into vibrational motion from the time

that power is first applied to the circuit until the first clock pulse is produced by the on–chip oscillator. The

user should check with the crystal vendor for a worst case specification on this time.

121395 18/19

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