
PRODUCT SPECIFICATION
1-1
Pin List
Chapter 1
by Muhammad Hafeez, Naeem Maan, Thorwald Rabeler, Luis Lucas, Gert Slavenburg
1.1
TM1300 VERSUS TM1100
The following summarizes pinout differences between
TM1100 and TM1300:
TM1300 uses a BGA 27x27 package and is hence
not physically pin compatible with TM1100.
TM1300 no longer has the MM_MATCHOUT and
MM_MATCHIN pins, SDRAM read timing is now
internally derived.
TM1300 recommends different VDDQ/VSSQ board
circuitry. Refer to VDDQ, VSSQ description.
We recommend 50-ohm PCB traces for all SDRAM
memory signal routing, with minimal wire lengths for
143-MHz SDRAM operation.
We recommend 27-33 ohm series terminating resis-
tors close to the TM1300 for all STRG3 and STRG5
I/O circuit pins used as outputs.
TM1300
has
one
new
memory
address
pin
(MM_A13) to support 16-bit wide 64-Mbit SDRAM.
TM1300 has 4 distinct serial stereo audio outputs
(AO_SD1..4) instead of the single octal channel
audio output (AO_SD) of TM1100.
TM1300 introduces the SPDIF audio output pin,
SPDO.
TM1300 uses new I/O pad types, with different
impedance/drive capabilities to ease board design.
Increased CPU frequency (up to 180 MHz) and
increased SDRAM speed grade (up to 143 MHz).
1.2
BOUNDARY SCAN NOTICE
TM1300 implements full IEEE 1149.1 boundary scan. Any TM1300 pin designated “IN” only (from a functionality point
of view) can become an output during boundary scan.
1.3
I/O CIRCUIT SUMMARY
TM1300 has a total of 169 functional pins, excluding VDDQ, VSSQ, VREF_PCI and VREF_PERIPH and digital power/
ground. TM1300 uses the types of I/O circuits shown in the table below.
For the pins with 5-V input capability, the special pins VREF_PCI or VREF_PERIPH determine 3.3- or 5-V input toler-
ance, as per the table in Section 1.6. The above pad types are used in the modes listed in the following table.
Pad Type
Pad Type Description
PCI
PCI2.1 compliant I/O, capable of using 3.3-V or 5-V PCI signaling conventions.
PCIOD
PCI2.1 compliant Open Drain I/O, capable of using 3.3-V or 5-V PCI signaling conventions.
IICOD
Open drain 3.3-V or 5-V I2C I/O (for I2C pins).
STRG3
3.3-V only low impedance I/O. Requires board level 27-33 ohm series terminator resistor to match 50 ohm
PCB trace.
NORM3
3.3-V only I/O circuit with regular drive strength and board trace matched drive impedance.
STRG5
3.3-V low impedance output, combined with 5-V tolerant input. If used as output, it requires a board level
27-33 ohm series terminator resistor to match 50-ohm PCB trace.
WEAK5
3.3-V regular impedance output, with slow rise/fall, combined with 5-V tolerant input.
Modes
Description
IN
Input only, except during boundary scan
OUT
Output only, except during boundary scan
OD
Open drain output - active pull low, no active drive high, requires external pull-up
I/O
Output or input
I/OD
Open drain output with input - active pull low, no active drive high, requires external pull-up