usb to uart mcu uart to smbus usb conn smbus conn description the usb to smbus tm interface board allows communication between a zilker labs digital-dc? evaluation board and a pc. this interface board has been designed to bridge pmbus commands from a pc application program to the smbus. the pmbus command set is used to configure a digital-dc device as well as monitor the power supply. pmbus tm commands are accessed using the zilker labs interface software from a pc running microsoft windows. refer to an13 C pmbus command set for more information on pmbus commands. the usb to smbus interface board is used by connecting the smbus interface connector directly to a zilker labs evaluation board. the smbus connector is found on the lower left- hand side of each evaluation board. refer to the zilker labs product evaluation board quick start guide and product data sheet for more information. features smbus control via usb smbus 2.0 and i 2 c 2.1 compatible pmbus compliant self powered from usb pre-installed firmware provides smbus reference rail applications this board has been designed to operate for the following conditions: interface to digital-dc evbs f smbus = 100 khz temperature range: 0c to +70c figure 1. usb to smbus interface figure 2. block diagram
ZLUSBREF01 2 ZLUSBREF01dsr1_0 schematics figure 1. usb to smbus
ZLUSBREF01 ZLUSBREF01dsr1_0 3 bill of materials item quan reference value tol rating type pcb footprint man ufacturer part number 1 11 c1,c2,c3,c4,c5,c7, c8,c9,c10,c11 100n 10% 10v x7r sm0603 kemet c0603c104k8ractu 2 2 c6,c13 10u 20% 6.3v sm0603 panasonic-ecg ecj-1vb0j106m 3 2 c12,c19 10n 10% 25v x7r sm0603 panasonic-ecg ecj-1vb1e103k 4 2 c14,c15 47p 5% 50v cog sm0603 tdk c1608c0g1h470j 5 2 c16,c17 22p 5% 50v cog sm0603 murata grm1885c1h220ja01d 6 2 d1,d2 esda6v1-4bc6 6.1v, 80w sot23_6l st micro esda6v1-4bc6 7 1 d3 bat54xv2t1os 200ma sod-523 on semi bat54xv2t1os 8 1 d4 led green 20ma clr sm0805_dio_1c2a chicago mini cmd17-21vgc 9 1 d5 led red 20ma clr sm0805_dio_1c2a chicago mini cmd17-21vrc 10 1 fb1 40 ohm 1.5a mlf sm0805 steward mi0805k400r-00 mi0805k400r-01 11 1 j1 usb type b usb\b molex 67068-0000 12 1 j2 header 5x2 hdrf5dualra100x100 samtec ssq-105-02-t-d-ra 13 1 j3 5 pin sn hdr5lk100 amp 640456-5 14 1 j4 2mm, 5 pin sn sip_5p_2.0mm sullins prpn051paen 15 1 j6 2 pin sn sip2/100 tyco 644456-2 16 3 q1,q2,q3 fdg6301n 25v dual n-ch sc70-6 fairchild semi fdg6301n 17 1 r1 0 thk film sm0805 yageo rc0805jr-070rl 18 1 r2 470 5% 63mw thk film sm0402 rohm mcrmzpf4700 19 2 r3,r5 10k 1% 100mw thk film sm0603 rohm mcr03ezpfx1002 20 5 r4,r6,r20,r26 10k 1% 63mw thk film sm0402 yageo rc0402fr-0710kl 21 3 r7,r8,r9 2.49k 1% 100mw thk film sm0603 rohm mcr03ezpfx2491 22 1 r10 1m 1% 63mw thk film sm0402 rohm mcr01mzpf1004 23 2 r11,r13 27 5% 63mw thk film sm0402 yageo rc0402jr-0727rl 24 1 r12 1.50k 1% 63mw thk film sm0402 yageo rc0402fr-071k5l 25 4 r17,r18,r24,r25 221 1% 63mw thk film sm0402 yageo rc0402fr-07221l 26 1 r21 4.75k 0.01 63mw thk film sm0402 panasonic-ecg erj-2rkf4751x 27 1 r23 2.49k 0.01 63mw thk film sm0402 panasonic-ecg erj-2rkf2491x 28 1 u1 atmega32l-8mc mcu mlf44_7x7_dp atmel atmega32l-8mc 29 1 u2 ft232bq tqfp32/.8p/9x9 ftdi ft232bq 30 1 u3 mic2920a-3.3ws 400ma sot223_1234_rev1 micrel mic2920a-3.3ws tr 31 1 u4 93c46-tssop 1.8 - 5.5v 93c46 tssop8/.65p/6.4 atmel at93c46-10ti-1.8 32 1 y1 6mhz resonator 0.01 comm ceralock murata cstcr6m00g53-r0 33 1 y2 8mhz crystal, cl = 18pf 30ppm csm-7 x575ct ecs inc ecs-80-18-5p ni tp1,tp2,tp3,tp4 t point s tp_020h ni r15,r16 ni 1% sm0402 ni j5 avrisp_10pinconn hdr10dual100x100 ni r14 10k 1% 63mw thk film sm0402 yageo rc0402fr-0710kl ni c18 100n 0.1 10v x7r sm0603 kemet c0603c104k8ractu ni = not installed
ZLUSBREF01 4 ZLUSBREF01dsr1_0 references [1] an13 ? pmbus command set , zilker labs, inc., 2007. [2] zl2005 data sheet , zilker labs, inc., 2006. [3] zl2105 data sheet , zilker labs, inc., 2007. [4] zl2005ev1 quick start guide, zilker labs, inc., 2006. [5] zl2105ev1 quick start guide, zilker labs, inc., 2006. ordering information orderable part number description ZLUSBREF01 usb to smbus interface revision history date rev. # 3/27/2007 0.5 preliminary release 4/26/2007 1.0 final release
ZLUSBREF01 ZLUSBREF01dsr1_0 5 notes
ZLUSBREF01 6 ZLUSBREF01dsr1_0 zilker labs, inc. 4301 westbank drive building a-100 austin, tx 78746 tel: 512-382-8300 fax: 512-382-8329 ? 2007, zilker labs, inc. all rights reserved. zilk er labs, digital-dc and the zilker labs logo are tr ademarks of zilker labs, inc. all other products or brand na mes mentioned herein are trademarks of their respec tive hold- ers. this document contains information on a reference d esign. pricing, specifications and availability are subject to change without notice. please see www.zilkerlabs.co m for updated information. this product is not inte nded for use in connection with any high-risk activity, incl uding without limitation, air travel, life critical medical operations, nuclear facilities or equipment, or the like. the reference designs contained in this document ar e for reference and example purposes only. the ref er- ence designs are provided "as is" and "with all fau lts" and zilker labs disclaims all warranties, whether express or implied. zilker labs shall not be liable for any damages, whether direct, indirect, consequentia l (including loss of prof- its), or otherwise, resulting from the reference de signs or any use thereof. any use of such reference designs is at your own risk a nd you agree to indemnify zilker labs for any damag es result- ing from such use.
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