XR16M680
2
1.62V TO 3.63V HIGH PERFORMANCE UART WITH 32-BYTE FIFO
REV. 1.0.0
FIGURE 2. PIN OUT ASSIGNMENT FOR 32-PIN QFN AND 48-PIN TQFP PACKAGES IN 16 AND 68 MODE
1 23 4 5 6 78
24 23 22 21 20 19 18 17
VCC
32
31
30
29
28
27
26
25
11
12
13
14
15
16
9
10
1
2
#
11
12
13
14
15
16
9
10 XTAL 1
XTAL 2
R/W#
GND
IOR#
PwrSave
NC
GND
RI#
D3
D2
D1
D0
VCC
DSR#
CD#
XTAL
IOW
GND
IOR
PwrSave
NC
D6
D7
RX
TX
CS
D4
D5
16/68
#
32- pin QFN in
Intel Bus Mode
RE
S
E
T
RT
S
#
INT
DT
R
#
A0
A1
A2
CT
S
#
RI#
D3
D2
D1
D0
VCC
DSR#
CD#
32
31
30
29
28
27
26
25
24 23 22 21 20 19 18 17
RESET
#
RT
S
#
IRQ
#
DT
R#
A0
A1
A2
CT
S
#
32-pin QFN in
Motorola Bus
Mode
1 2 3456 78
D6
D7
RX
TX
CS#
D4
D5
16/68
#
VCC
36 35 34 33 32 31 30 29 28 27 26 25
24
23
22
21
20
19
18
17
16
15
14
13
37
38
39
40
41
42
43
44
45
46
47
48
48-TQFP in
Motorola Bus Mode
1 2
3
4
5
6
7
8
9 10 11 12
36 35 34 33 32 31 30 29 28 27 26 25
37
38
39
40
41
42
43
44
45
46
47
48
48-TQFP in
Intel Bus Mode
VCC
GND
1
2
3
4
5
6
7
8
9 10 11 12
RESET
NC
DTR
#
RTS#
NC
IN
T
NC
A0
A1
A2
NC
24
23
22
21
20
19
18
17
16
15
14
13
NC
CTS#
DSR#
CD#
RI#
VCC
D0
D1
D2
D3
D4
D5
D6
D7
NC
RX
TX
NC
CS
#
NC
16/6
8
#
RE
SE
T
#
NC
DT
R#
RT
S#
NC
IR
Q#
NC
A0
A1
A2
NC
D5
D6
D7
NC
RX
TX
NC
CS#
16
/6
8
#
NC
CTS#
DSR#
CD#
RI#
VCC
D0
D1
D2
D3
D4
NC
IOR#
GND
NC
IOW#
XTAL2
XTAL1
PwrSave
NC
IOR#
GND
NC
R/W#
XTAL2
XTAL1
PwrSave
NC
VCC