MC56F8346 Freescale Semiconductor, Inc, MC56F8346 Datasheet - Page 23

• Manufacturer Part Number: MC56F8346
• Description: 56f8300 16-bit Digital Signal Controllers
• Manufacturer: Freescale Semiconductor, Inc

Freescale Semiconductor
Preliminary
Signal Name
(GPIOE2)
(GPIOE3)
(GPIOA0)
(GPIOA1)
(GPIOA2)
(GPIOA3)
(GPIOA4)
(GPIOA5)
(GPIOA6)
(GPIOA7)
A10
A11
A12
A13
A14
A15
A6
A7
A8
A9
Table 2-2 Signal and Package Information for the 144 Pin LQFP
Pin No.
17
18
19
20
21
22
23
24
25
26
Schmitt
Schmitt
Output
Output
Output
Output
Input/
Input/
Type
disabled,
pull-up is
disabled,
pull-up is
output is
output is
In reset,
enabled
In reset,
enabled
During
56F8346 Technical Data, Rev. 15
Reset
State
Address Bus — A6 - A7 specify two 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), A6 - A7 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 E GPIO — These two 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 GPIOE_PUR register.
Example: GPIOE2, clear bit 2 in the GPIOE_PUR register.
Address Bus— A8 - A15 specify eight 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), A8 - A15 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 eight 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: GPIOA0, clear bit 0 in the GPIOA_PUR register.
Signal Description
Signal Pins
23