參數(shù)資料
型號(hào)： PCD5002AH
廠商： NXP SEMICONDUCTORS
元件分類： 尋呼電路
英文描述： Enhanced Pager Decoder for APOC1/POCSAG
中文描述： TELECOM, PAGING DECODER, PQFP32
封裝： 7 X 7 MM, 1.40 MM HEIGHT, PLASTIC, SOT-358-1, LQFP-32
文件頁(yè)數(shù)： 20/48頁(yè)
文件大?。?/td> 252K
代理商： PCD5002AH
1999 Jan 08
20
Philips Semiconductors
Product specification
Enhanced Pager Decoder for
APOC1/POCSAG
PCD5002A
Fig.9 Message types.
(a) Master writes to slave.
(b) Master reads from slave.
(c) Combined format (shown: write plus read).
handbook, full pagewidth
n bytes with acknowledge
FROM
MASTER
FROM
SLAVE
A
A
S
SLAVE ADDRESS
R/W
DATA
A
DATA
A
P
S = START condition
P = STOP condition
A = Acknowledge
N = Not acknowledge
n bytes with acknowledge
A
S
SLAVE ADDRESS
R/W
DATA
DATA
P
A
(a)
(b)
(c)
R/W
DATA
SL. ADR.
SL. ADR.
R/W
DATA
0 (write)
0 (write)
1 (read)
1 (read)
index
address
index
address
n bytes with
acknowledge
n bytes with
acknowledge
change of direction
N
A
A
A
INDEX
INDEX
A
S
S
N
P
MLC250
8.27
Decoder I
2
C-bus access
All internal access to the PCD5002A takes place via the
I
2
C-bus interface. For this purpose the internal registers,
SRAM and EEPROM have been memory mapped and are
accessed via an
index register
. Table 16 shows the index
addresses of all internal blocks.
Registers are addressed directly, while RAM and
EEPROM are addressed indirectly via address pointers
and I/O registers.
Remark
: The EEPROM memory map is non-contiguous
and is organized as a matrix. The EEPROM address
pointer contains both row and column indicators.
Data written to read-only bits will be ignored. Values read
from write-only bits are undefined and must be ignored.
Each I
2
C-bus write message to the PCD5002A must start
with its slave address, followed by the index address of the
memory element to be accessed. An I
2
C-bus read
message uses the last written index address as a data
source. The different I
2
C-bus message types are shown in
Fig.9.
As a slave the PCD5002A cannot initiate bus transfers by
itself. To prevent an external controller from having to
monitor the operating status of the decoder, all important
events generate an external interrupt on output INT.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PCD5002H 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Advanced POCSAG and APOC-1 Paging Decoder
PCD5002HBD-S 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecommunication Decoder
PCD5002HBD-T 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telecommunication Decoder
PCD5002U/10 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Advanced POCSAG and APOC-1 Paging Decoder
PCD5003 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Advanced POCSAG Paging Decoder
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