mcf51em256 Freescale Semiconductor, Inc, mcf51em256 Datasheet - Page 16

• Manufacturer Part Number: mcf51em256
• Description: Microcontrollers Covers Mcf51em256 Mcf51em128
• Manufacturer: Freescale Semiconductor, Inc

1
Electrical Characteristics
2
This section contains electrical specification tables and reference timing diagrams for the
MCF51EM256/128 series microcontrollers, including detailed information on power considerations,
DC/AC electrical characteristics, and AC timing specifications.
The electrical specifications are preliminary and are from previous designs or design simulations. These
specifications may not be fully tested or guaranteed at this early stage of the product life cycle. These
specifications will, however, be met for production silicon. Finalized specifications will be published after
complete characterization and device qualifications have been completed.
2.1
The electrical parameters shown in this supplement are guaranteed by various methods. To give the
customer a better understanding the following classification is used and the parameters are tagged
accordingly in the tables where appropriate:
16
LQFP
These pins that are shared with the LCD are open-drain by default if not used as LCD pins. To configure this pins as full
complementary drive outputs, you must have the LCD modules bits configured as follow: FCDEN =1, VSUPPLY = 11 and RVEN
= 0. The Input levels and internal pullup resistors are referenced to VLL3. Referer to the LCD chapter for further information.
100
100
87
88
89
90
91
92
93
94
95
96
97
98
99
Electrical Characteristics
Parameter Classification
LQFP
80
—
—
—
—
71
72
73
74
75
76
77
78
79
80
The parameters specified in this data sheet supersede any values found in
the module specifications.
Table 4. MCF51EM256 Series Package Pin Assignments (continued)
Default Function
VCAP2
VCAP1
LCD17
LCD18
LCD19
LCD20
LCD21
LCD22
LCD23
LCD24
MCF51EM256 Series ColdFire Microcontroller Data Sheet, Rev.3
VLL3
VLL2
VLL1
V
SS
Preliminary—Subject to Change Without Notice
ALT1
NOTE
ALT2
ALT3
Freescale Semiconductor
Comment