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Post Info TOPIC: Denso AUD pinout


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Denso AUD pinout


So far we have details on 7052 based denso ECUs from a 2006 Busa, 2007 SV1000 and a Z1000 all using the AUD port.

Bozo documented the pinout of his sv1000 AUD as...

The pads are numbered 1 to 12 from right to left, and they connect to the 7052 as follows:

1. PVcc, and also to pin 106 (HRxD) via a 10k resistor
2. earth
3. AUDCK
4. AUDSYNC
5. AUDATA3
6. AUDATA2
7. AUDATA1
8. AUDATA0
9. pin 110 (SCK2), and also 10k resistor to earth
10. AUDMD
11. HTxD (pin 187), and also 10k resistor to earth
12. AUDRST

From the datasheet, only 8 lines are needed for AUD (apart from a common ground):
3. AUDCK for clocking in the addresses and clocking out the data
4. AUDSYNC (low to feed in an address, high to read out the data)
5..8 AUDATA (4 bits, address/command/data)
10. AUDMD (high for RAM monitor mode)
12. AUDRST (for resetting the AUD in the mode selected by AUDMD)



PetriK can you confirm this is the same pinout used by the 2006 Busa and can you find out what the pinout on the Z1000 is. I'm trying to figure out if Denso has a standardized pinout for all their 7052 ECUs



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Yes 8+Gnd is needed. I got the needed pins based on what was intially presented on this board in ZX6 thread. The same pinout was basis for the z1000 interface. The AUD connector has been marked as CN501 on these Denso ECUs even though the format may vary a bit.

Here are the same details.

From left to right when looking from the back of the board:

1.- PVCC
2.- VSS
3.- AUDCK
4.- AUDSYNC
5.- AUDATA3
6.- AUDATA2
7.- AUDATA1
8.- AUDATA0
9.-
10.- AUDMD
11.-
12.- AUDRST

One additional thing while remembered: Additionally what I am using the Vcc from the ECU for the 74HC245. The processor is somewhat picky about the voltage being withing +-0.3v from Vcc. When I had Vcc=4.58V on external board compared to Vcc=5.05 on sh7052 I got some very inconsistent readings. Also the 74HC245 has internal diodes supplying voltage to the chip Vcc when high - which propably also contributed to this problem.

Jost wondering why Bozo has not seen the same inconsistency with the propeller which runs 3.3V (if I remember correctly) ?



-- Edited by PetriK at 16:43, 2007-11-30

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Having just opened "the real thing" - I think it is safe to add Busa K5 .on the "sh7052 based Denso ECUs with an AUD connector" list.

K5 Euro model: 32920-24FGO
K6 USA model: 32920-24FK0

Busa K5 Euro


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PetriK wrote:

When I had Vcc=4.58V on external board compared to Vcc=5.05 on sh7052 I got some very inconsistent readings. Also the 74HC245 has internal diodes supplying voltage to the chip Vcc when high - which propably also contributed to this problem.

Jost wondering why Bozo has not seen the same inconsistency with the propeller which runs 3.3V (if I remember correctly) ?




Hi Petri, the only place that 5v was critical was on the RST line. Here I pulled it high to PVcc with a resistor. The propeller only ever pulled the line low. All other pins only needed more than 2.2v to work properly. The MD line also needs 5v, but I never connected it to the propeller as it gets pulled high internally if there's no connection ... perfect for selecting RAM monitor mode!

Cheers,
Mark.

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Interesting ! One more reason to consider Propeller ...




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