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3.16.3.14 EPx_SIZE Register (x: 0 to 7)
EP0_SIZE_L_A
bit Symbol
(0798H)
Read/Write
After reset
EP1_SIZE_L_A
bit Symbol
(0799H)
Read/Write
After reset
bit Symbol
EP2_SIZE_L_A
(079AH)
Read/Write
After reset
bit Symbol
EP3_SIZE_L_A
Read/Write
(079BH)
After reset
bit Symbol
EP4_SIZE_L_A
Read/Write
(079CH)
After reset
bit Symbol
EP5_SIZE_L_A
Read/Write
(079DH)
After reset
bit Symbol
Read/Write
EP6_SIZE_L_A
(079EH)
After reset
bit Symbol
Read/Write
EP7_SIZE_L_A
(079FH)
After reset
Note EP4,5,6,7_SIZE_L_A registers are not used at TMP92CZ26A.
These registers have following function.
a)
In the receiving, showing data number for 1 packet which was received correctly.
b) In the transmitting, it shows payload size. But it shows length value when short
packet is transferred.
This register is not needed to read when it is transmitting.
c) Showing dual packet mode and effective packet.
Each endpoint has H (High)-register that shows upper bit 9 to bit7 of data size and L
(Low) register which shows lower bit 6 to bit0 and control bit of FIFO.
And each H/L register has 2-set for dual-packet mode.
By reset, these are initialized to maximum payload size.
7
6
PKT_ACTIVE
DATASIZE6
R
R
1
0
7
6
PKT_ACTIVE
DATASIZE6
R
R
1
0
7
6
PKT_ACTIVE
DATASIZE6
R
R
1
0
7
6
PKT_ACTIVE
DATASIZE6
R
R
1
0
7
6
PKT_ACTIVE
DATASIZE6
R
R
1
0
7
6
PKT_ACTIVE
DATASIZE6
R
R
1
0
7
6
PKT_ACTIVE
DATASIZE6
R
R
1
0
7
6
PKT_ACTIVE
DATASIZE6
R
R
1
0
5
4
DATASIZE5
DATASIZE4
DATASIZE3
R
R
0
0
5
4
DATASIZE5
DATASIZE4
DATASIZE3
R
R
0
0
5
4
DATASIZE5
DATASIZE4
DATASIZE3
R
R
0
0
5
4
DATASIZE5
DATASIZE4
DATASIZE3
R
R
0
0
5
4
DATASIZE5
DATASIZE4
DATASIZE3
R
R
0
0
5
4
DATASIZE5
DATASIZE4
DATASIZE3
R
R
0
0
5
4
DATASIZE5
DATASIZE4
DATASIZE3
R
R
0
0
5
4
DATASIZE5
DATASIZE4
DATASIZE3
R
R
0
0
92CZ26A-393
TMP92CZ26A
3
2
1
DATASIZE2
DATASIZE1
R
R
R
1
0
0
3
2
1
DATASIZE2
DATASIZE1
R
R
R
1
0
0
3
2
1
DATASIZE2
DATASIZE1
R
R
R
1
0
0
3
2
1
DATASIZE2
DATASIZE1
R
R
R
1
0
0
3
2
1
DATASIZE2
DATASIZE1
R
R
R
1
0
0
3
2
1
DATASIZE2
DATASIZE1
R
R
R
1
0
0
3
2
1
DATASIZE2
DATASIZE1
R
R
R
1
0
0
3
2
1
DATASIZE2
DATASIZE1
R
R
R
1
0
0
0
DATASIZE0
R
0
0
DATASIZE0
R
0
0
DATASIZE0
R
0
0
DATASIZE0
R
0
0
DATASIZE0
R
0
0
DATASIZE0
R
0
0
DATASIZE0
R
0
0
DATASIZE0
R
0
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