mcf51em256 Freescale Semiconductor, Inc, mcf51em256 Datasheet - Page 37

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

2.11
2.12
This section describes AC timing characteristics for each peripheral system.
Freescale Semiconductor
1
2
3
o
10
N
V
2000 pF Load LCD, frame frequency = 32 Hz
VSUPPLY = 10, BYPASS = 0
1
2
3
4
5
6
7
8
9
IREG
C
D
D
D
D
D
D
D
D
D
Max can not exceed V
LCD Specifications
AC Characteristics
LCD frame frequency
LCD charge pump capacitance
LCD bypass capacitance
LCD glass capacitance
V
V
V
V
V
Figure 14. Deviation of DCO Output from Trimmed Frequency (50.33 MHz, 25 °C)
IREG
IREG
IREG
IREG
LCD
60
50
40
30
20
10
buffered adder
0
trim resolution
ripple
current adder
2.00 V
MCF51EM256 Series ColdFire Microcontroller Data Sheet, Rev.3
DD
2.25 V
3
Characteristic
– 0.15 V
Preliminary—Subject to Change Without Notice
2.50 V
Table 18. LCD Electricals, 3 V Glass
2.75 V
HRefSel = 0
HRefSel = 1
HRefSel = 0
HRefSel = 1
Vdd (V)
3.00 V
RVEN = 1
3.25 V
Symbol
C
Δ
I
f
C
V
C
VIREG
Frame
BYLCD
RTRIM
I
IREG
glass
Buff
3.50 V
LCD
3.75 V
1.49
Min
.89
1.5
28
—
—
—
4.00 V
Typical
2000
1.00
1.67
100
100
30
1
Electrical Characteristics
1
2
HR
MR
LR
1.85
8000
Max
1.15
0.15
100
100
0.1
58
1
V
Unit
Hz
IREG
μA
μA
nF
nF
pF
%
V
V
37