STLC5466 STMicroelectronics, STLC5466 Datasheet - Page 60
STLC5466
Manufacturer Part Number
STLC5466
Description
RF Wireless Misc Multi-HDLC Sw Matrix
Manufacturer
STMicroelectronics
Type
Telecom ICr
Specifications of STLC5466
Operating Temperature Range
- 40 C to + 85 C
Package / Case
LQFP-176
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Mounting Style
SMD/SMT
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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STLC5466
VI.33 - General Configuration Register 2
MC0/1 :
NINIT : NOT INIT
BYP
D6
60/130
bit15
Nu
: BYPASS
: HDLC2 connected to MATRIX
Nu
MC0/1: these two bits take into account the signal applied on MCLK pin. So whatever the fre-
quency may be, the internal circuit operates with the appropriate internal clock and the exchang-
es between Multi-HDLC and SDRAM are at the Master Clock frequency.
The duration of the pulse named token ring is equal to the period of master clock applied
to MCLK pin.
NINIT=1; when the microprocessor writes the SDRAM register with NINIT=1, the SDRAM will
not be initialized.
NINIT=0; when the microprocessor writes the SDRAMR register with NINIT=0, the SDRAM will
be initialized in accordance with LT0/2 bits (of SDRAMR).
In case of several Multi-HDLC’s connected to the same memory, only one of them initializes and
refreshes the SDRAM.
So the GCR2 registers of these Multi-HDLC’s are same contents except this bit which initializes
the SDRAM.
BYPASS=1; the write FIFO and the read fetch memory located in the microprocessor interface
are bypassed.
BYPASS=0; the write FIFO and the read fetch memory located in the microprocessor interface
are used when the microprocessor accesses the shared memory.
D6=1, the transmit HDLC2 is connected to matrix input 6, the DIN6 signal is ignored.
Master Clock0/1
MC1
0
0
1
1
Nu
MC0
Nu
0
1
0
1
Nu
Signal applied on MCLK pin
Nu
After reset (0000)
Nu
Not used
66MHz
50MHz
33MHz
bit8
Nu
bit7
Nu
H
id 512ms
SWAP
Exchanges between Multi-HDLC and
D6
SDRAM with common clock at
BYP NINIT
Not used
66MHz
50MHz
33MHz
0
GCR2 (42)
MC1
MC0
bit0
H
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