TTP/C-C1 Communications Controller Data Sheet

AS8201

Rev. NC, October 1999

Page 11 of 13

Austria Mikro Systeme International AG

TTA-C1

OE[0]

CTS[0]

TXD[0]

RXD[0]

BDE[0]

PCA82C250

TXD

RXD

CL

CH

OE[1]

CTS[1]

TXD[1]

RXD[1]

BDE[1]

PCA82C250

TXD

RXD

CL

CH

BUS0

BUS1

TTA-C1

OE[0]

CTS[0]

TXD[0]

RXD[0]

BDE[0]

MAX1487

DI

DO

CL

CH

OE[1]

CTS[1]

TXD[1]

RXD[1]

BDE[1]

BUS0

DE

RE

MAX1487

DI

DO

CL

CH

BUS1

DE

RE

Figure 7: Transceivers with Recessive State

Figure 8: Transceivers with Three-State Output

Test Interface

Pin Name

mode

width

comment

FTEST

in (pull down)

1

functional test mode

FTEST_EIN

in (pull down)

1

instruction insertion enable

LED

out

7

LED vector

TEST_SE

in (pull down)

1

scan enable

Table 6: Test Interface Ports

The ports of the test interface support the manufacturing test of the chip. In the application

environment FTEST, FTEST_IEN, and TEST_SE are not connected. The LED bus can be

used as a universal output port. The driver strength of the LED ports is 4mA.