PCD5008 datasheet(40/64 Pages) PHILIPS

40 / 64 page

1998 Jun 17

Philips Semiconductors

Product speciﬁcation

FLEX

™ Pager Decoder

PCD5008

8.7.8.3

Alphanumeric Message

FLEX

™ alphanumeric messages are encoded using the

7-bit encoded alphanumeric character set defined in

Table 43. Characters are placed in codewords along with

additional information about the message as described in

Tables 44 and 45 and the following definitions. The 7-bit

characters of the message are designated lower case

letters a, b, c, d, etc.

Alphanumeric messages can be sent as fragments.

See Section 8.8.5 for a description of message

fragmentation.

Control characters that are not acted upon by the pager

are ignored in the display process (do not require display

space) but are stored in memory for possible download to

an external device. The ASCII character ETX (03H) should

be used to fill any unused 7-bit characters in a word.

Where symbolic characters (e.g. Chinese, Kanji etc.) are

being transmitted, special rules for fragment and message

termination are defined in Section 8.8.5.1.

Each 7-bit field, starting with the second character of the

second word in the message (first character of the second

word in all remaining fragments), represents standard

ASCII (ISO 646-1983E) characters with options for certain

international characters.

Table 43 FLEX

™ alphanumeric character set

LEAST SIGNIFICANT 4 BITS

OF CHARACTER (HEX)

MOST SIGNIFICANT 3 BITS OF CHARACTER (HEX)

01234567

NUL

DLE

‘

SOH

DC1

STX

DC2

“

ETX

DC3

EOT

DC4

ENQ

NAK

ACK

SYN

BEL

ETB

’

CAN

(

TAB

)

SUB

ESC

;

[

{

CFF



M]m

}

ESO

DEL

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