TCM-BF537 Datasheet, PDF (31/37 Pages) List of Unclassifed Manufacturers – Bluetechnix Mechatronische Systeme GmbH

4.9 Reset circuit
The reset of the flash and the processor are connected to a power monitoring IC. The output can be used as power
on reset for external devices, see Figure 4-9.
3.3V
TCM809SENB713
3
1
VDD
RESET
GND
2
U5
GND Core Module
R12
470R
RESET of Flash
RESET of ADSP-BF5xx
External
RESET
Figure 4-9: Schematic of reset circuit on the Core Module
4.10 Flash Memory Extension PINS
4.10.1 PINS FA20 to FA24
Flash pin Blackfin pin
FA20
FA21
FA22
FA23
FA24
PF4
PF5
PG13
PG14
PG15
Table 4-3: Pins FA20 to FA24
All pins are pulled down by default.
The signals FA20 and FA21 are used to address the (first) 8MB of Flash memory. These signals are connected directly
with the Blackfin pins PF4 (FA20) and PF5 (FA21) (see chapter 2.3) so you cannot use FA20 or FA21 for your own
purposes! The signals FA22-FA24 can be used to address up to 64MByte of Flash memory (if installed on the Core
Module). The signals FA22-FA23 are connected through a 0R resistor array with the Blackfin signals PG13 (FA22),
PG14 (FA23) and PG15 (FA24). If you need the signals PG13-PG15 for your own purposes (for example to use the
SPORT1 interface) AND you want to address up to 64MByte Flash memory, so you can remove the 0R resistor array
and use other GPIOs for FA22-FA24 (in this case you must connect these GPIOs externally to FA22-F24). Please
contact Bluetechnix Support for further informations.
4.10.2 WP_FLASH
Is pulled high by default so flash is unprotected. To write protect the flash connect this pin to GND.
TCM‐BF537 v1.x‐Hardware User Manual
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