Datasheet

DS2148/DS21Q48
21 of 73
Figure 2-1. Parallel Port Mode Pinout (BIS1 = 0, BIS0 = 1 or 0) (TQFP
Package)
Figure 2-2. Serial Port Mode Pinout (BIS1 = 1, BIS0 = 0) (TQFP Package)
1 CS*
2 RD (DS)
3 WR* (R/W*)
4 ALE (AS)
5 NA
6 NA
7 A4
8 A3
9 A2
10 A1
11 A0
BIS1 33
BIS0 32
BPCLK 31
MCLK 30
HRST* 29
RRING 28
RTIP 27
TEST 26
RCL/LOTC 25
PBEO 24
INT* 23
34 TTIP 35 VSS 36 VDD 37 TRING 38 RPOS 39 RNEG 40 RCLK 41 TPOS 42 TNEG 43 TCLK 44 PBTS
VSS 22
VDD 21
VSM 20
AD0/D0 19 AD1/D1 18 AD2/D2 17 AD3/D3 16 AD4/D4 15 AD5/D5 14 AD6/D6 13 AD7/D7 12
DS2148
Parallel Port
Operation
(Note: tie all NA pins low)
tie low
tie low (MUX) or high (non-MUX)
t
i
e
h
i
g
h
1 CS*
2 NA
3 NA
4 NA
5 SCLK
6 SDI
7 SDO
8 ICES
9 OCES
10 NA
11 NA
BIS1 33
BIS0 32
BPCLK 31
MCLK 30
HRST* 29
RRING 28
RTIP 27
TEST 26
RCL/LOTC 25
PBEO 24
INT* 23
34 TTIP 35 VSS 36 VDD 37 TRING 38 RPOS 39 RNEG 40 RCLK 41 TPOS 42 TNEG 43 TCLK 44 PBTS
VSS 22
VDD 21
VSM 20
NA 19 NA 18 NA 17 NA 16 NA 15 NA 14 NA 13 NA 12
DS2148
Serial Port
Operation
(Note: tie all NA pins low)
tie high
tie low
t
i
e
l
o
w
t
i
e
h
i
g
h