ak2573a AKM Semiconductor, Inc., ak2573a Datasheet - Page 33

• Manufacturer Part Number: ak2573a
• Description: 125m / 156m Laser Diode Driver Apc - Asahi Kasei Microsystems
• Manufacturer: AKM Semiconductor, Inc.

ASAHI KASEI
8.4 Register
Register memory map is shown in Table 8-6 and 8-7. Register access is limited with WP pin and Operation mode
(refer to Fig 9-1, for more information).
Table 8-6 Register (Device Address = A8h)
Note 1: The data format of read / write via I
Note 2: R_DAC1 = R_DAC1_FF + R_DAC1_FB, R_DA C1>=0,
Note 3: R_DAC2 = R_DAC2_FF + R_DAC2_FB, R_DA C2 >= 0
<MS0189-E-01>
Register
R_V RFTRIM[7:4]
R_TEMP_OFFSET[3:0]
R_APC_FF_SET[7:6]
R_APC_FB_SET[5:4]
R_APC_INIT_SET[3]
R_SFP[2]
R_DAC1_GAIN[1]
R_DAC2_GAIN[0]
R_TEMP_DET[5]
R_TIMER_OPTALM[4]
R_A LM_POL[3]
R_OPTALM[1:0]
R_TEMP_WIN[6:0]
R_DAC1_FBRT[6:0]
R_DATAA LM_MASK[0]
R_DAC2_FBRT[6:0]
R_PDGAIN[5:0]
R_TEMPALM[6:0]
R_TEMP[6:0]
R_TEMP_STDW[6:0]
R_DAC1_FF[7:0]
R_DAC2_FF[7:0]
R_A PC_FB[8:0]
R_DAC1_FB[8:0]
R_DAC2_FB[8:0]
R_DAC1[7:0]
R_DAC2[7:0]
R_A PC_TRGT[4:0]
R_CURRA LM_DA C1[7:4]
R_CURRA LM_DA C2[3:0]
R_DUTY[4:0]
AKM Test
A ddress
00h
00h
01h
01h
01h
01h
01h
01h
02h
02h
02h
02h
03h
05h
06h
07h
08h
09h
0Ah
0Bh
0Ch
0Dh
0Eh
11h
12h
13h
14h
15h
16h
16h
17h
18h-
1Dh
at shutdown release ON/OFF
detection with OPTALM
request
Function
Oscillator Frequency
Temperature sensor offset
APC FF Setting
APC FB Setting
APC FB Initial Setting
MSA(SFP) Setting
I-DAC1 Gain
I-DAC2 Gain
Temperature compensation
Delay time of TXFAULT
ALM Polarity
OPTALM Reference Level
Temperature Difference
APC FB Ratio for I-DAC1
DATAALM Mask
APC FB Ratio for I-DAC2
PDGAIN
TEMPALM Level
Detected Temperature
Temperature at Shutdown
I-DA C1 FF
I-DA C2 FF
APC FB
I-DA C1 FB
I-DA C2 FB
I-DAC1
I-DAC2
APC Reference
CURRALM for I-DAC1
CURRALM for I-DAC2
Duty Adjust
Test for AKM
Detection Level
2
C
TM
(8bit) is shown in Fig 8-1.
-33-
Bit Type R/W
4
4
2
2
1
1
1
1
1
1
1
2
7
7
1
7
6
7
7
7
8
8
9
9
9
8
8
5
4
4
5
-
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
U
S
S
S
U
U
U
U
U
U
-
U
U
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/(W) see Table 4-9
R/(W) see section 6.2
R/W
R/W
R/(W) Note 1
R/(W) Note 1
R/(W) Note 1
R/(W) Note 2
R/(W) Note 3
R/W
R/W
R/W
R/W
-
R/W
Remark
see Table 4-4
see Table 4-4
0: No initial Setting
1: Initial Setting
0: No SFP Support
1: SFP Support
0: Gain = 1/2
1: Gain = 1
0: Gain = 1/2
1: Gain = 1
0: OFF
1: ON
0: 160ms
1: 2ms
0: “ H”
1: “ L”
00: 1/3, 01: 1/4
10: 1/6, 11: 1/7
see section 6.2
see section 4.3
0: DATA ALM Valid
1: DATAALM Invalid
see section 4.3
see Table 4-9
Note 2
Note 3
see Table 4-3
see section 5.2
see Table 4-2
see section 5.2
[AK2573A]
2004/5