STLC5465B STMicroelectronics, STLC5465B Datasheet - Page 68

• Manufacturer Part Number: STLC5465B
• Description: Telecom ICs Multi-HDLC Sw Matrix
• Manufacturer: STMicroelectronics
• Type: Telecom IC - Variousr

Specifications of STLC5465B

• Operating Supply Voltage: 4.75 V to 5.25 V
• Operating Temperature Range: - 40 C to + 85 C
• Mounting Style: SMD/SMT
• Package / Case: PQFP-160
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

STLC5465B
VIII - INTERNAL REGISTERS
‘Not used’ bits (Nu) are accessible by the microprocessor but the use of these bits by software is not
recommended.
‘Reserved’ bits are not implemented in the circuit. However, it is not recommended to use this address.
VIII.1 - Identification and Dynamic Command Register - IDCR (00)H
When this register is read by the microprocessor, the circuit code C0/15 is returned. Reset has no effect
on this register.
C0/3 indicates the version.
C4/7 indicates the revision.
C8/11 indicates the foundry.
C12/15 indicates the type.
Example : this code is (0010)H for the first sample.
When this register is written by the microprocessor then :
TL
WDR
RSS
After writing this register, the values of these three bits return to the default value.
VIII.2 - General Configuration - GCR (02)H
WDD
PMA
TRD
68/101
bit15
bit15
bit15
SBV
C15
Nu
MBL
C14
: TOKEN LAUNCH
: WATCHDOG RESET.
: RESET SOFTWARE
: Watch Dog Disable
: Priority Memory Access
: Token Ring Disable
Nu
When TL is set to 1 by the microprocessor, the token pulse is launched from the TRO pin (Token
Ring Output pin). This pulse is provided to the TRI pin (Token Ring Input pin) of the next circuit
in the applications where several Multi-HDLC s are connected to the same shared memory.
When the bit 1 (WDR) of this register is set to 1 by the microprocessor, the watchdog counter is
reset.
When the bit 2 (RSS) of this register is set to 1 by the microprocessor, the circuit is reset (Same
action as reset pin).
WDD = 1, the Watch Dog is masked : WDO pin stays at ”0”.
WDD = 0, the Watch Dog generates an ”1” on WDO pin if the microprocessor has not reset the
Watch Dog during the duration programmed in Timer Register.
PMA = 1, if the token ring has been launched it is captured and kept in order to authorize
memory accesses.
PMA = 0, memory is accessible only if the token is present; after one memory access the token
is re-launched from TRO pin of the current circuit to TRI pin of the next circuit.
TRD = 1, if the token has been launched, the token ring is stopped and destroyed ; memory
accesses are not possible. The token will not appear on TRO pin.
TRD = 0, the token ring is authorized ; when the token will be launched,it will appearon TRO pin.
AFAB
C13
Nu
SCL
C12
Nu
BSEL SELB CSD
C11
Nu
C10
Nu
C9
Nu
After reset (0000)
bit8
bit8
HCL
C8
Nu
bit8
SYN1 SYN0 D7
bit7
bit7
C7
Nu
bit7
H
C6
Nu
C5
Nu
EVM
C4
Nu
TSV
C3
Nu
TRD
RSS
C2
WDR
PMA
C1
WDD
bit 0
bit 0
bit 0
C0
TL