參數(shù)資料
型號(hào): PCF5083
廠商: NXP Semiconductors N.V.
英文描述: STEEL COVER
中文描述: GSM信號(hào)處理IC
文件頁(yè)數(shù): 58/136頁(yè)
文件大?。?/td> 602K
代理商: PCF5083
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1996 Oct 29
58
Philips Semiconductors
Objective specification
GSM signal processing IC
PCF5083
9.1.6
S
YSTEM
C
ONTROLLER INTERFACE
The PCF5083 parallel port is used for communication with the P90CL301 System Controller (SC) which is compatible
with the 68000 family microcontrollers. Details about interfacing are described in Chapter 10.
The host port of the DSP has three internal registers:
1.
PI; 16-bit parallel input register (write-only)
2.
PO; 16-bit parallel output register (read-only)
3.
PIOS; 5-bit parallel I/O Status/Control register (see Table 50).
The 16-bit words of registers PI and PO are transferred in two access cycles of 8-bits. The LOW byte/HIGH byte selection
is controlled with HA0 and with bit 5 of the PIOS register, PLSB. For correct interrupt generation the transfer order should
be HA1 and HA0 = 00; then HA1 and HA0 = 01 (see Table 48).
Table 48
Host port register addressing
Table 49
Status/Control Register (PIOS)
Table 50
Description of PIOS bits
PLSB
HA1
HA0
DESCRIPTION
STATUS REGISTER PIOS
CHANGE
0 (1)
0 (1)
X
X
0
0
1
1
0
1
0
1
access PI/PO HIGH (LOW) byte
access PI/PO LOW (HIGH) byte
reserved
read status register PIOS
no change
PISE = 0 or POSF = 0
no change
no change
7
6
5
4
3
2
1
0
PLSB
PORQEN
PIRQEN
POSF
PISE
BIT
NAME
PLSB
DIRECTION
read
DESCRIPTION
7
6
5
4
These three bits are not used.
This bit controls the parallel transfer order. When PLSB = 1; the LSB is
transferred first. The reset value is a logic 1.
When PORQEN = 1; PORQN is enabled. The reset value is a logic 0.
When PIRQEN = 1; PIRQN is enabled. The reset value is a logic 0.
When POSF = 1; the Output Register (PO) is full. The reset value is a
logic 0.
When PISE = 1; the Input Register (PI) is empty. The reset value is a
logic 1.
3
2
1
PORQEN
PIRQEN
POSF
read/write
read/write
read
0
PISE
read
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