DS2155 datasheet(38/262 Pages) DALLAS

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DS2156

38 of 262

4. PARALLEL PORT

The SCT is controlled by either a nonmultiplexed (MUX = 0) or a multiplexed (MUX = 1) bus through an

external microcontroller or microprocessor. The SCT can operate with either Intel or Motorola bus timing

configurations. If the BTS pin is connected low, Intel timing is selected; if connected high, Motorola

timing is selected. All Motorola bus signals are listed in parentheses (). See the timing diagrams in AC

Electrical Characteristics in Section 36 for more details.

4.1

Table 4-A. Register Map Sorted by Address

ADDRESS

xxh

R/W

SYMBOL

PAGE

R/W

Master Mode Register

MSTRREG

R/W

I/O Configuration Register 1

IOCR1

R/W

I/O Configuration Register 2

IOCR2

R/W

T1 Receive Control Register 1

T1RCR1

R/W

T1 Receive Control Register 2

T1RCR2

R/W

T1 Transmit Control Register 1

T1TCR1

R/W

T1 Transmit Control Register 2

T1TCR2

R/W

T1 Common Control Register 1

T1CCR1

R/W

Software Signaling Insertion Enable 1

SSIE1

R/W

Software Signaling Insertion Enable 2

SSIE2

R/W

Software Signaling Insertion Enable 3

SSIE3

100

R/W

Software Signaling Insertion Enable 4

SSIE4

100

R/W

T1 Receive Digital Milliwatt Enable Register 1

T1RDMR1

R/W

T1 Receive Digital Milliwatt Enable Register 2

T1RDMR2

R/W

T1 Receive Digital Milliwatt Enable Register 3

T1RDMR3

Device Identification Register

IDR

R/W

Information Register 1

INFO1

Information Register 2

INFO2

157

R/W

Information Register 3

INFO3

Interrupt Information Register 1

IIR1

Interrupt Information Register 2

IIR2

R/W

Status Register 1

SR1

158

R/W

Interrupt Mask Register 1

IMR1

159

R/W

Status Register 2

SR2

R/W

Interrupt Mask Register 2

IMR2

R/W

Status Register 3

SR3

R/W

Interrupt Mask Register 3

IMR3

R/W

Status Register 4

SR4

R/W

Interrupt Mask Register 4

IMR4

R/W

Status Register 5

SR5

112

R/W

Interrupt Mask Register 5

IMR5

112

R/W

Status Register 6

SR6

141

R/W

Interrupt Mask Register 6

IMR6

142

R/W

Status Register 7

SR7

141

R/W

Interrupt Mask Register 7

IMR7

142

R/W

Status Register 8

SR8

118

DS2155 Datasheet(PDF) 38 Page - Dallas Semiconductor

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