MAX1460 Datasheet, PDF (12/20 Pages) Maxim Integrated Products – Low-Power, 16-Bit Smart ADC

Low-Power, 16-Bit Smart ADC
Table 7. EEPROM Memory Map
EE Address (hex)
Contents
10 0F 0E 0D 0C 0B 0A 09 08 07 06 05 04 03 02 01
MSB
Configuration
LSB
EE Address (hex)
Contents
20 1F 1E 1D 1C 1B 1A 19 18 17 16 15 14 13 12 11
MSB
Gain
LSB
EE Address (hex)
Contents
30 2F 2E 2D 2C 2B 2A 29 28 27 26 25 24 23 22 21
MSB
G₁
LSB
EE Address (hex)
Contents
40 3F 3E 3D 3C 3B 3A 39 38 37 36 35 34 33 32 31
MSB
G₂
LSB
EE Address (hex)
Contents
50 4F 4E 4D 4C 4B 4A 49 48 47 46 45 44 43 42 41
MSB
Of₀
LSB
EE Address (hex)
Contents
60 5F 5E 5D 5C 5B 5A 59 58 57 56 55 54 53 52 51
MSB
Of₁
LSB
EE Address (hex)
Contents
70 6F 6E 6D 6C 6B 6A 69 68 67 66 65 64 63 62 61
MSB
Of₂
LSB
EE Address (hex)
Contents
00 7F 7E 7D 7C 7B 7A 79 78 77 76 75 74 73 72 71
MSB
D_OFF
LSB
Table 8. Subset of DSP Instruction
INSTRUCTION
CODE (PS)
(HEX)
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
PROGRAM
COUNTER
(P)
(HEX)
66 or 6C
47
11
2E
38
03
22
56
01
3B
S REGISTER VALUE
Register 0—Configuration
Register 1—Gain
Register 2—G₁
Register 3—G₂
Register 4—Of₀
Register 5—Of₁
Register 6—Of₂
Register 7—D_OFF
Register 8—Temperature
Signal
Register 9—Sensor Signal
EA
65 or 6B
Register 10—Compensated
Output D
There are three internal DSP registers that are directly
observable on the SDIO and SDO pins:
• S: 16-bit DSP Scratch or Accumulator register, con-
taining the result of the execution of the current
microcode instruction.
• P: 8-bit DSP Program Pointer register, which holds
the address of the instruction ROM microcode.
• PS: 8-bit DSP Program Store register. PS is the
instruction that the DSP is currently executing. PS is
the instruction ROM data at address P.
The DSP instructions relevant to the test system are list-
ed in Table 8.
After the test system sends the Start Conversion com-
mands 8 hex or A hex, SDIO and SDO are both
enabled as MAX1460 serial outputs. The test system
should disable (high impedance) its SDIO driver to
avoid a bus conflict at this time so that the MAX1460
can drive the pin. After the DSP executes each one of
the microcode instructions, the contents of the registers
S, P, and PS are output in a serial format (Figure 4).
A new DSP instruction and a new state of the S, P, and
PS registers are delivered every 16n + 9 clock cycles,
where n = 0, 1, 2... after the Start Conversion command
completes. The tester should latch the SDIO and SDO
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