DS2155 datasheet(33/238 Pages) DALLAS

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DS2155

33 of 238

5. 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 37 for more details.

5.1 Register Map

Table 5-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

R/W

Software Signaling Insertion Enable 4

SSIE4

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

153

R/W

Information Register 3

INFO3

—

Unused

—

Interrupt Information Register 1

IIR1

Interrupt Information Register 2

IIR2

R/W

Status Register 1

SR1

154

R/W

Interrupt Mask Register 1

IMR1

155

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

106

R/W

Interrupt Mask Register 5

IMR5

106

R/W

Status Register 6

SR6

135

R/W

Interrupt Mask Register 6

IMR6

136

R/W

Status Register 7

SR7

135

R/W

Interrupt Mask Register 7

IMR7

136

R/W

Status Register 8

SR8

112

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