XR16C854/854D
2
2.97V TO 5.5V QUAD UART WITH 128-BYTE FIFO
REV. 3.1.0
FIGURE 2. PIN OUT ASSIGNMENT FOR 100-PIN QFP PACKAGES IN 16 AND 68 MODE
XR16C854
100-pin QFP
16 Mode
Connect 16/68# pin to VCC
1
2
3
4
5
6
7
8
9
1
0
1
2
1
3
1
4
1
5
1
6
1
7
1
8
1
9
2
0
2
1
2
3
2
4
2
5
2
6
2
7
2
8
2
9
3
0
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
100
99
98
97
96
95
94
93
92
91
90
89
88
87
86
85
84
83
82
81
8
0
7
9
7
8
7
6
7
5
7
4
7
3
7
2
7
1
7
0
6
9
6
8
6
7
6
5
6
4
6
3
6
2
6
1
6
0
5
9
5
8
5
7
5
6
5
4
5
3
5
2
5
1
N
.C
.
N
.C
.
N
.C
.
N
.C
.
T
X
R
D
Y
A
#
IR
T
X
A
D
S
R
A
#
C
T
S
A
#
D
T
R
A
#
V
C
R
T
S
A
#
IN
T
A
C
S
A
#
T
X
A
IO
W
#
T
X
B
C
S
B
#
IN
T
B
R
T
S
B
#
G
N
D
T
R
B
#
C
T
S
B
#
D
S
R
B
#
IR
T
X
B
T
X
R
D
Y
B
#
N
.C
.
N
.C
.
N
.C
.
N
.C
.
N
.C
.
RXRDYB#
CDB#
RIB#
RXB
CLKSEL
16/68#
A2
A1
A0
XTAL1
XTAL2
CHCCLK
RESET
RXRDY#
TXRDY#
GND
RXC
RIC#
CDC#
RXRDYC#
N
.C
.
N
.C
.
N
.C
.
N
.C
.
F
S
R
S
#
IR
T
X
D
S
R
D
#
C
T
S
D
#
D
T
R
D
#
G
N
D
R
T
S
D
#
IN
T
D
C
S
D
#
T
X
D
IO
R
#
T
X
C
S
C
#
IN
T
C
R
T
S
C
#
V
C
D
T
R
C
#
C
T
S
C
#
D
S
R
C
#
IR
T
X
C
T
X
R
D
Y
C
#
N
.C
.
N
.C
.
N
.C
.
N
.C
.
N
.C
.
RXRDYA#
CDA#
RIA#
RXA
GND
D7
D6
D5
D4
D3
D2
D1
D0
INTSEL
VCC
RXD
RID#
CDD#
RXRDYD#
TXRDYD#
XR16C854
100-pin QFP
68 Mode
Connect 16/68# pin to GND
1
2
3
4
5
6
7
8
9
1
0
1
2
1
3
1
4
1
5
1
6
1
7
1
8
1
9
2
0
2
1
2
3
2
4
2
5
2
6
2
7
2
8
2
9
3
0
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
100
99
98
97
96
95
94
93
92
91
90
89
88
87
86
85
84
83
82
81
8
0
7
9
7
8
7
6
7
5
7
4
7
3
7
2
7
1
7
0
6
9
6
8
6
7
6
5
6
4
6
3
6
2
6
1
6
0
5
9
5
8
5
7
5
6
5
4
5
3
5
2
5
1
N
.C
.
N
.C
.
N
.C
.
N
.C
.
T
X
R
D
Y
A
#
IR
T
X
A
D
S
R
A
#
C
T
S
A
#
D
T
R
A
#
V
C
R
T
S
A
#
IR
Q
#
C
S
#
T
X
A
R
/W
#
T
X
B
A
3
N
.C
.
R
T
S
B
#
G
N
D
T
R
B
#
C
T
S
B
#
D
S
R
B
#
IR
T
X
B
T
X
R
D
Y
B
#
N
.C
.
N
.C
.
N
.C
.
N
.C
.
N
.C
.
RXRDYB#
CDB#
RIB#
RXB
CLKSEL
16/68#
A2
A1
A0
XTAL1
XTAL2
CHCCLK
RESET#
RXRDY#
TXRDY#
GND
RXC
RIC#
CDC#
RXRDYC#
N
.C
.
N
.C
.
N
.C
.
N
.C
.
F
S
R
S
#
IR
T
X
D
S
R
D
#
C
T
S
D
#
D
T
R
D
#
G
N
D
R
T
S
D
#
N
.C
.
N
.C
.
T
X
D
N
.C
.
T
X
C
A
4
N
.C
.
R
T
S
C
#
V
C
D
T
R
C
#
C
T
S
C
#
D
S
R
C
#
IR
T
X
C
T
X
R
D
Y
C
#
N
.C
.
N
.C
.
N
.C
.
N
.C
.
N
.C
.
RXRDYA#
CDA#
RIA#
RXA
GND
D7
D6
D5
D4
D3
D2
D1
D0
GND
VCC
RXD
RID#
CDD#
RXRDYD#
TXRDYD#