dsp56800eerm Freescale Semiconductor, Inc, dsp56800eerm Datasheet - Page 21

• Manufacturer Part Number: dsp56800eerm
• Description: 16-bit Digital Signal Controllers
• Manufacturer: Freescale Semiconductor, Inc

Freescale Semiconductor
Preliminary
(GPIOA10)
(GPIOA11)
(GPIOA12)
(GPIOA13)
(GPIOA8)
(GPIOA9)
Signal
CLKO
Name
XTAL
A0
A1
A2
A3
A4
A5
Table 2-2 Signal and Package Information for the 160-Pin LQFP and MBGA
154
Pin
No.
93
10
11
12
13
14
3
Ball No.
K12
D3
C3
E3
E4
F2
F1
F3
Output
Output
Output
Output
Input/
Input/
Type
56F8357 Technical Data, Rev. 15
Chip-driven
disabled,
pull-up is
output is
output is
disabled
In reset,
In reset,
enabled
During
Reset
State
Crystal Oscillator Output — This output connects the internal
crystal oscillator output to an external crystal.
If an external clock is used, XTAL must be used as the input
and EXTAL connected to GND.
The input clock can be selected to provide the clock directly to
the core. This input clock can also be selected as the input
clock for the on-chip PLL.
Clock Output — This pin outputs a buffered clock signal.
Using the SIM CLKO Select Register (SIM_CLKOSR), this pin
can be programmed as any of the following: disabled,
CLK_MSTR (system clock), IPBus clock, oscillator output,
prescaler clock and postscaler clock. Other signals are also
available for test purposes.
See
Address Bus — A0 - A5 specify six of the address lines for
external program or data memory accesses.
Depending upon the state of the DRV bit in the EMI bus control
register (BCR), A0–A5 and EMI control signals are tri-stated
when the external bus is inactive.
Most designs will want to change the DRV state to DRV = 1
instead of using the default setting.
Port A GPIO — These six GPIO pins can be individually
programmed as input or output pins.
After reset, the default state is Address Bus.
To deactivate the internal pull-up resistor, clear the appropriate
GPIO bit in the GPIOA_PUR register.
Example: GPIOA8, clear bit 8 in the GPIOA_PUR register.
Part 6.5.7
for details.
Signal Description
Signal Pins
21