Phytec phyCORE-MPC5200B tiny, Hardware Manual

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phyCORE-MPC5200B tiny
20
©
PHYTEC Messtechnik GmbH 2006 L-678e_0
The jumpers (J = solder jumper) have the following functions:
Jumper Default Comment
J1, J2 J1 and J2 disconnect the receive lines (UART3_RXD_TTL
and UART6_RXD_TTL) of the MPC5200B PSC3 and PSC6
from the RS-232 transceiver at U3. This makes the controller's
TTL signals available at pins X1D16 (UART3_RXD_TTL)
and X1C19 (UART6_RXD_TTL). This is useful, for instance,
for optical isolation of the RS-232 interface.
open The UART receive signals UART3_RXD_TTL and
UART6_RXD_TTL are disconnected from the RS-232
transceiver.
closed X The UART receive signals UART3_RXD_TTL and
UART6_RXD_TTL are connected to the on-board RS-232
transceiver.
Package Type 0R in SMD 0805
J3 J3 connects pin 7 of the serial memory at U4 to 3V3. On many
memory devices pin 7 enables the activation of a write protect
function.
It is not guaranteed that the standard serial memory populating
the phyCORE-MPC5200B tiny will have this write protection
function.
Please refer to the corresponding memory data sheet for more
detailed information.
open X
closed
Package Type 0R in SMD 0805
J5, J6 J5 and J6 define the slave addresses (A1 and A2) of the serial
memory U4 on the I
2
C2 bus. In the high-nibble of the address,
I
2
C memory devices have the slave ID 0xA. The low-nibble
consists of A2, A1, A0, and the R/W bit. A0 is tied to GND. It
must be noted that the RTC at U5 is also connected to the I
2
C
bus. The RTC has the address 0xA2/0xA3 which cannot be
changed.
1 + 2, 2 + 3 X A2= 0, A1= 0, A0= 0 (0xA0 / 0xA1)
I
2
C slave address 0xA0 for write operations and 0xA1 for read
access.
1 + 2, 1 + 2 A2= 1, A1= 0, A0= 0 (0xA8 / 0xA9)
2 + 3, 2 + 3 A2= 0, A1= 1, A0= 0 (0xA4 / 0xA5)
2 + 3, 1 + 2 A2= 1, A1= 1, A0=0 (0xAC / 0xAD)
Package Type 0R in SMD 0805