SENA HD1200 - Manual (Page 7)

Starter Kit and User Manual for the HelloDevice 1200
4
3.1 External Interface
The HelloDevice provides JP1 and JP2 connectors that has 38 signal pins for external interface, which allows
internal components of the main board such as microprocessor, Ethernet controller and dual-port RAM to be
interfaced with the user device. Figure 3.3 and Table 3.1 represent the pin assignment for the external interface
of the HelloDevice 1200.
Figure 3.3. The HelloDevice 1200 External Interface
Pin Symbol Description
1~ 11 BA0 ~ BA10 Dual-Port RAM Address
12 ~ 19 BD0 ~ BD7 Dual-Port RAM Data
20 GND Ground
21 Write
22 CE
23 Read
24 IRQ
25 Busy
Dual-Port RAM Control Signal (Write)
Dual-Port RAM Control Signal (Chip Enable)
Dual-Port RAM Control Signal (Read)
Dual-Port RAM Control Signal (IRQ)
Dual-Port RAM Control Signal (Busy)
26 Reset Microprocessor Reset
27 ~ 32 Not Used
33 ~ 35 LED0 ~ LED2 Ethernet Status Indicator LED (Tx, Rx, Collision)
36 Tx+
37 Tx-
38 Rx+
39 Rx- RJ45 Connector Ethernet Data
40 Vcc Power Supply Vcc
Table 3.1. Pin Assignment of the HelloDevice External Interface
JP1
JP2
20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
GND BD7 BD6 BD5 BD4 BD3 BD2 BD1 BD0 BA10 BA9 BA8 BA7 BA6 BA5 BA4 BA3 BA2 BA1 BA0
Write CE Read IRQ busy Reset Led2 Led1 Led0 Tx+ Tx- Rx+ Rx- Vcc