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DS34T102 Datasheet - Page 184

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____________________________________________________ DS34T101, DS34T102, DS34T104, DS34T108
11.4.3 Counters
Each counter can be read from two different addresses. Reading from the first address—0x10,000 + offset—does
not affect the counter value. Reading from the second address—0x11,000 + offset—causes the counter to be
cleared after it is read.
Table 11-6. Counters Types
Address
Counter Type
10,000
Counters – no clear on read
11,000
Counters – clear on read
When reading from counters wider than 16 bits in 16-bit mode, use the following procedure:
1. Read from address 2, i.e. H_AD[1]=1. All 32 bits are internally latched and bits 15:0 are output on
H_D[15:0].
2. Read from address 0, i.e.
11.4.3.1 Per Bundle Counters
In the register descriptions in this section, the index n indicates the bundle number: 0 to 63.
Ethernet Rx Good Packets Counter 0x000+n*4
Bits
Data Element Name
[31:0]
Good_packets_received
Ethernet Tx Good Packets Counter 0x200+n*4
Bits
Data Element Name
[31:0]
Good_packets_transmitted
Ethernet Rx Lost/Jump Event Packets Counter 0x300+n*4
Bits
Data Element Name
[31:16]
Reserved
[15:0]
Lost_AAL1_packets_Rxd /
Lost_HDLC_packets_Rxd /
Jumped_SAToP/CESoPSN_
packets_Rxd
Read/Write
Read Only
Read Only-Clear on Read
H_AD
[1]=0. Bits 31:16 are output on H_D[15:0].
Reset
R/W
Value
R
None
Good packets received from Ethernet. Counter wraps
around to 0 from its maximum value.
Reset
R/W
Value
R
None
Good packets transmitted to Ethernet. Counter wraps
around to 0 from its maximum value.
Reset
R/W
Value
-
None
Must be set to zero
R
None
Number of lost/jumped packets encountered by
RX_AAL1, RX_HDLC or RX_SATOP payload machine:
AAL1 and SAToP/CESoPSN – The counter is increased
by the gap between the received packet sequence
number and the expected packet sequence number
(except when this gap is higher than the configured
Rx_max_lost_packets
HDLC – The counter is increased by the difference
between the received packet sequence number and the
expected packet sequence number only when this
difference is smaller than 32768.
SAToP/CESoPSN – the CPU can calculate the number of
lost packets using the following equation:
lost packets = (jumped packets –
Reset Value
None
None
Description
Description
Description
value).
Rxd reordered
packets)
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