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DS21448L Datasheet(PDF) 7 Page - Dallas Semiconductor |
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DS21448L Datasheet(HTML) 7 Page - Dallas Semiconductor |
7 / 60 page DS21448 3.3V T1/E1/J1 Quad Line Interface 7 of 60 2. PIN DESCRIPTION The DS21448 can be controlled in parallel port mode, serial port mode, or hardware mode. The bus interface select bits 0 and 1 (BIS0, BIS1) determine the device mode and pin assignments (Table 2-A). Table 2-A. Bus Interface Selection BIS1 BIS0 BUS INTERFACE TYPE 0 0 Parallel Port Mode (multiplexed) 0 1 Parallel Port Mode (nonmultiplexed) 1 0 Serial Port Mode 1 1 Hardware Mode Table 2-B. Pin Assignments PIN BGA LQFP I/O PARALLEL PORT MODE SERIAL PORT MODE HARDWARE MODE J3 18 I CS1 CS1 EGL1 D3 57 I CS2 CS2 EGL2 D10 84 I CS3 CS3 EGL3 K10 114 I CS4 CS4 EGL4 J2 91 I RD (DS) N/A ETS H1 92 I WR (R/W) N/A NRZE K2 95 I ALE (AS) N/A SCLKE J1 35 I N/A SCLK L2 K3 36 I N/A SDI L1 K1 62 I/O A4 SDO L0 L1 63 I A3 ICES DJA H11 64 I A2 OCES JAMUX H12 65 I A1 N/A JAS G12 66 I A0 N/A HBE J10 75 I/O D7/AD7 N/A CES H10 76 I/O D6/AD6 N/A TPD G11 77 I/O D5/AD5 N/A TX0 J9 78 I/O D4/AD4 N/A TX1 E3 79 I/O D3/AD3 N/A LOOP0 D4 80 I/O D2/AD2 N/A LOOP1 F3 81 I/O D1/AD1 N/A MM0 D5 82 I/O D0/AD0 N/A MM1 — 3 I VSM VSM VSM L5 115–117 — VDD1 VDD1 VDD1 E4 19–21 — VDD2 VDD2 VDD2 D8 49–51 — VDD3 VDD3 VDD3 J8 85–87 — VDD4 VDD4 VDD4 M4 118–120 — VSS1 VSS1 VSS1 F4 22–24 — VSS2 VSS2 VSS2 D9 52–54 — VSS3 VSS3 VSS3 H9 88–90 — VSS4 VSS4 VSS4 K9 97 I/O INT INT RT1 K5 110 O PBEO1 PBEO1 PBEO1 G3 111 O PBEO2 PBEO2 PBEO2 E10 121 O PBEO3 PBEO3 PBEO3 K8 123 O PBEO4 PBEO4 PBEO4 L6 126 O RCL1/LOTC1 RCL1/LOTC1 RCL1 D7 128 O RCL2/LOTC2 RCL2/LOTC2 RCL2 F9 1 O RCL3/LOTC3 RCL3/LOTC3 RCL3 J7 2 O RCL4/LOTC4 RCL4/LOTC4 RCL4 K7 98 I TXDIS/TEST TXDIS/TEST TXDIS/TEST A1 124 I RTIP1 RTIP1 RTIP1 A4 28 I RTIP2 RTIP2 RTIP2 A7 60 I RTIP3 RTIP3 RTIP3 A10 93 I RTIP4 RTIP4 RTIP4 B2 125 I RRING1 RRING1 RRING1 B5 29 I RRING2 RRING2 RRING2 |
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