UM0843 datasheet(20/48 Pages) STMICROELECTRONICS

20 / 48 page

Block descriptions

UM0843

20/48

Doc ID16543 Rev 2

6.7

General purpose ADC connector

Eight analog input lines are available on J27 connector. Inside the connector it is also

possible to determine the range of the conversion by setting the conversion limits on the pin

J27-19 (lower limit) and J27-1 (upper limit) via jumpers.

By default the on-board VREFP and VREFN jumper configuration of ADC is selected as

shown in Table 15.

The following relationship between the pins should be guaranteed in the application:

6.8

NOR Flash

The NOR Flash is connected to the EMI interface of CPU, two NOR Flash (U7,U10) are

available on the board, the bit-width is 32-bit, the current memory size is 128Mbit. The 32bit

NOR Flash is mapped to memory space of CPU, use Jumpers (JP1,JP2,JP3,JP4,JP5,JP6)

to select one of six memory space.

By default the memory space mapping of NOR Flash is selected as shown in Table 16

Table 15.

General ADC reference voltage settings

Jump

Description

Configuration

J27-1

J27-2

Connects the +2V5_ADC on-board ADC supply voltage

to the ADC_VREFP pin of the CPU board (Default)

Connects the external ADC application supply voltage to

the ADC_VREFP pin J27-1 of the CPU board

J27-19

J27-20

Connects the application board GND of the ADC supply

voltage domain to the ADC_VREFN pin of the CPU board

(Default)

Connects the external ADC application GND (lower limit)

supply voltage to the ADC_VREFN pin J27-19 of the

CPU board

≤

J27-19

≤ J27-3-J27-17

≤

J27-1

≤

+2.5V

GND

≤ ADC_VREFN ≤

AIN0 -AIN7

≤ ADC_VREFP ≤

+2V5ADC

19 20

Table 16.

Memory space map jumpers of NOR Flash

Jumper

Description

Configuration

JP1

NOR Flash is mapped to EMI CSn0

memory space:

0x50000000

JP2

Nor Flash is mapped to EMI CSn1

memory space:

0x60000000

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