ispClock 5600 Family ™ In-System Programmable, Zero-Delay Clock Generator with Universal Fan-Out Buffer November 2004 Preliminary Data Sheet Features ■ ■ ■ ■ • Up to +/- 12ns skew range • Coarse and fine adjustment modes 10MHz to 320MHz Input/Output Operation Low Output to Output Skew (<50ps) Low Jitter Peak-to-Peak (<60ps) Up to 20 Programmable Fan-out Buffers ■ Up to Five Clock Frequency Domains ■ Flexible Clock Reference and External Feedback Inputs • Programmable input standards - LVTTL, LVCMOS, SSTL, HSTL, LVDS, LVPECL • Clock A/B selection multiplexer • Feedback A/B selection multiplexer • Programmable termination • Programmable output standards and individual enable controls - LVTTL, LVCMOS, HSTL, SSTL, LVDS, LVPECL • Programmable output impedance - 40 to 70Ω in 5Ω increments • Programmable slew rate • Up to 10 banks with individual VCCO and GND - 1.5V, 1.8V, 2.5V, 3.3V ■ Four User-programmable Profiles Stored in E2CMOS® Memory • Supports both test and multiple operating configurations ■ Fully Integrated High-Performance PLL ■ Full JTAG Boundary Scan Test In-System Programming Support ■ Exceptional Power Supply Noise Immunity ■ Commercial (0 to 70°C) and Industrial (-40 to 85°C) Temperature Ranges ■ 100-pin and 48-pin TQFP Packages ■ Applications • Programmable lock detect • Multiply and divide ratio controlled by - Input divider (5 bits) - Feedback divider (5 bits) - Five output dividers (5 bits) • Programmable On-chip Loop Filter ■ Precision Programmable Phase Adjustment (Skew) Per Output • Circuit board common clock generation and distribution • PLL-based frequency generation • High fan-out clock buffer • Zero-delay clock buffer • 16 settings; minimum step size 195ps - Locked to VCO frequency Product Family Block Diagram OUTPUT DIVIDERS BYPASS MUX * OUTPUT DRIVERS V1 M PHASE/ FREQUENCY DETECTOR V2 FILTER VCO V3 N V4 PLL CORE FEEDBACK INPUTS SKEW CONTROL V0 Internal/External Feedback Select * JTAG INTERFACE & E2CMOS MEMORY OUTPUT ROUTING MATRIX CLOCK OUTPUTS REFERENCE INPUTS LOCK DETECT Multiple Profile Management Logic 0 1 2 3 INTERNAL FEEDBACK PATH * Input Available only on ispClock5620 © 2004 Lattice Semiconductor Corp. All Lattice trademarks, registered trademarks, patents, and disclaimers are as listed at www.latticesemi.com/legal. All other brand or product names are trademarks or registered trademarks of their respective holders. The specifications and information herein are subject to change without notice. www.latticesemi.com 1 clk5600_01 Lattice Semiconductor ispClock5600 Family Data Sheet General Description and Overview The ispClock5610 and ispClock5620 are in-system-programmable high-fanout PLL-based clock drivers designed for use in high performance communications and computing applications. The ispClock5610 provides up to 10 single-ended or five differential clock outputs, while the ispClock5620 provides up to 20 single-ended or 10 differential clock outputs. Each pair of outputs may be independently configured to support separate I/O standards (LVDS, LVPECL, LVTTL, LVCMOS, SSTL, HSTL) and output frequency. In addition, each output provides independent programmable control of termination, slew-rate, and timing skew. All configuration information is stored on-chip in nonvolatile E2CMOS memory. The ispClock5600’s PLL and divider systems supports the synthesis of clock frequencies differing from that of the reference input through the provision of programmable input and feedback dividers. A set of five post-PLL V-dividers provides additional flexibility by supporting the generation of five separate output frequencies. Loop feedback may be taken internally from the output of any of the five V-dividers, or externally through FBKA+/- or FBKB+/- pins. The core functions of all members of the ispClock5600 family are identical, the differences between devices being restricted to the number of inputs and outputs, as shown in the following table. Figures 1 and 2 show functional block diagrams of the ispClock5610 and ispClock5620. Table 1. ispClock5600 Family Members Ref. Input Pairs Feedback Input Pairs Clock Outputs ispClock5610 Device 1 1 10 ispClock5620 2 2 20 Figure 1. ispClock5610 Functional Block Diagram PS0 PS1 LOCK RESET PLL_BYPASS SGATE Profile Select Control 0 1 2 OUTPUT ROUTING MATRIX INPUT DIVIDER (1-32) PHASE DETECT REFVTT LOOP FILTER VCO 0 BANK_0A BANK_0B BANK_4B (2-64) FBKA+ FBKA FBKVTT JTAG INTERFACE TDI TMS TCK TDO 2 BANK_4A BANK_5A V4 FEEDBACK SKEW ADJUST BANK_2B (2-64) V3 E 2 Configuration BANK_2A V2 (2-64) FEEDBACK DIVIDER OUTPUT DRIVERS V0 (2-64) 1 SKEW CONTROL OUTPUT DIVIDERS V1 M (1-32) OEY OUTPUT ENABLE CONTROLS (2-64) N OEX 3 LOCK DETECT REFA+ REFA- GOE BANK_5B BANK_7A BANK_7B Lattice Semiconductor ispClock5600 Family Data Sheet Figure 2. ispClock5620 Functional Block Diagram PS0 PS1 LOCK RESET PLL_BYPASS SGATE 1 2 OEX OEY OUTPUT ROUTING MATRIX Profile Select Control 0 GOE SKEW CONTROL OUTPUT DRIVERS BANK_0A OUTPUT ENABLE CONTROLS BANK_0B 3 BANK_1A LOCK DETECT BANK_1B BANK_2A BANK_2B OUTPUT DIVIDERS BANK_3A BANK_3B V0 (2-64) REFSEL BANK_4A REFA+ REFA- INPUT DIVIDER 0 M 1 (1-32) REFVTT V1 1 PHASE DETECT REFB+ REFB- BANK_4B (2-64) LOOP FILTER VCO 0 V2 (2-64) V3 (2-64) SKEW CONTROL OUTPUT DRIVERS BANK_5A BANK_5B N (1-32) FEEDBACK DIVIDER V4 (2-64) BANK_6A BANK_6B FBKSEL FBKA+ FBKA- BANK_7A E 2 Configuration BANK_7B 0 FBKVTT BANK_8A 1 FBKB+ FBKB- BANK_8B BANK_9A JTAG INTERFACE TDI TMS TCK FEEDBACK SKEW ADJUST TDO 3 BANK_9B Lattice Semiconductor ispClock5600 Family Data Sheet Absolute Maximum Ratings ispClock5600V Core Supply Voltage VCCD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5 to 5.5V PLL Supply Voltage VCCA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5 to 5.5V JTAG Supply Voltage VCCJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5 to 5.5V Output Driver Supply Voltage VCCO . . . . . . . . . . . . . . . . . . . . . . . . . -0.5 to 4.5V Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5 to 4.5V Output Voltage1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5 to 4.5V Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -65 to 150°C Junction Temperature with power supplied . . . . . . . . . . . . . . . . . . . -40 to 130°C 1. When applied to an output when in high-Z condition Recommended Operating Conditions ispClock5600V Symbol Min. Max. Units Core Supply Voltage Parameter 3.0 3.6 V VCCJ JTAG I/O Supply Voltage 1.62 3.6 V VCCA Analog Supply Voltage 3.0 3.6 V VCCXSLEW VCC Turn-on Ramp Rate All supply pins — 0.33 V/µs Commercial 0 100 -40 115 0 701 -40 851 VCCD Conditions TJOP Operating Junction Temperature TA Ambient Operating Temperature Industrial Commercial Industrial °C °C 1. Device power dissipation may also limit maximum ambient operating temperature. Recommended Operating Conditions – VCCO vs. Logic Standard VCCO (V) Logic Standard VREF (V) VTT (V) Min. Typ. Max. Min. Typ. Max. Min. Typ. Max. LVTTL 3.0 3.3 3.6 — — — — — — LVCMOS 1.8V 1.71 1.8 1.89 — — — — — — LVCMOS 2.5V 2.375 2.5 2.625 — — — — — — LVCMOS 3.3V 3.0 3.3 3.6 — — — — — — — VREF + 0.04 VREF + 0.05 SSTL2 Class 1 2.375 2.5 2.625 1.15 1.25 1.35 VREF - 0.04 SSTL3 Class 1 3.0 3.3 3.6 1.30 1.50 1.70 VREF - 0.05 VREF HSTL Class 1 1.425 1.5 1.575 0.68 0.75 0.90 — 0.5 x VCCO — LVPECL (Differential) 3.0V 3.3V 3.6V — — — — — — VCCO = 2.5V 2.375 2.5V 2.625 — — — — — — VCCO = 3.3V 3.0 3.3 3.6 — — — — — — Units LVDS Note: ‘—’ denotes VREF or VTT not applicable to this logic standard E2CMOS Memory Write/Erase Characteristics Parameter Conditions Erase/Reprogram Cycles 4 Min. Typ. Max. 1000 — — Lattice Semiconductor ispClock5600 Family Data Sheet Performance Characteristics – Power Supply Symbol Parameter Conditions Typ. Max. Units ICCD Core Supply Current fVCO = 640MHz 150 160 mA ICCA Analog Supply Current fVCO = 640MHz 5.5 7 mA 1 ICCO Output Driver Supply Current (per Bank) VCCO = 1.8V , LVCMOS VCCO = 2.5V1, LVCMOS VCCO = 3.3V1, LVCMOS VCCO = 3.3V2, LVDS 13 18 24 7.5 15 24 35 8 mA ICCJ JTAG I/O Supply Current (static) VCCJ = 1.8V VCCJ = 2.5V VCCJ = 3.3V 200 300 300 300 400 400 µA 1. Supply current consumed by each bank, both outputs active, 18pF load, 320MHz output frequency. 2. Supply current consumed by each bank, 100Ω, 5pf differential load, 320MHz output frequency. DC Electrical Characteristics – Single-ended Logic VIL (V) Logic Standard Min. LVTTL/LVCMOS 3.3V VIH (V) Max. -0.3 Min. 0.8 Max. 2 VOL Max. (V) VOH Min. (V) 3.6 0.4 LVCMOS 1.8V -0.3 0.35VCCO 0.65VCCO 3.6 0.4 LVCMOS 2.5V -0.3 0.7 1.7 3.6 0.4 SSTL2 Class 1 -0.3 VREF - 0.18 VREF + 0.18 IOL (mA) VCCO - 0.4 VCCO - 0.4 2 3.6 0.54 2 SSTL3 Class 1 -0.3 VREF - 0.2 VREF + 0.2 3.6 0.9 HSTL Class 1 -0.3 VREF - 0.1 VREF + 0.1 3.6 0.43 -41 1 4 -41 41 -41 4 VCCO - 0.4 2 VCCO - 0.81 IOH (mA) 1 7.6 -7.6 2 VCCO - 1.3 8 -8 VCCO - 0.43 8 -8 1. Specified for 50Ω internal series output termination. 2. Specified for 40Ω internal series output termination. 3. Specified for ≈20Ω internal series output termination. DC Electrical Characteristics – LVDS Symbol Parameter Conditions Min. Typ. Max. Units VICM Common Mode Input Voltage 0.05 — 2.35 V VTHD Differential Input Threshold ±100 — — mV VIN Input Voltage VOH Output High Voltage RT = 100Ω VOL Output Low Voltage VOD Output Voltage Differential ∆VOD Change in VOD between H and L VOS Output Voltage Offset ∆VOS Change in VOS Between H and L ISA Output Short Circuit Current ISAB Output Short Circuit Current 0 — 2.4 V — 1.375 1.60 V RT = 100Ω 0.9 1.03 — V RT = 100Ω 250 400 480 mV — — 50 mV 1.125 1.20 1.375 V — — 50 mV VOD = 0V, Outputs Shorted to GND — — 24 mA VOD = 0V, Outputs Shorted to Each Other — — 12 mA Common Mode Output Voltage 5 Lattice Semiconductor ispClock5600 Family Data Sheet DC Electrical Characteristics – Differential LVPECL Symbol Parameter VIH Input Voltage High VIL Input Voltage Low VOH Output High Voltage1 VOL Output Low Voltage1 Test Conditions VCCO = 3.0 to 3.6V VCCO = 3.3V VCCO = 3.0 to 3.6V VCCO = 3.3V VCCO = 3.0 to 3.6V VCCO = 3.3V VCCO = 3.0 to 3.6V VCCO = 3.3V Min. Typ. Max. VCCO - 1.17 — VCCO - 0.88 Units 2.14 — 2.42 VCCO - 1.81 — VCCO - 1.48 1.49 — 1.83 VCCO - 1.07 — VCCO - 0.88 2.23 — 2.42 VCCO - 1.81 — VCCO - 1.62 1.49 — 1.68 V V V V 1. 100Ω differential termination. DC Electrical Characteristics – Input/Output Loading Symbol Parameter Conditions Typ. Max. Units — — ±10 µA Input Leakage IPU Input Pull-up Current Note 2 — 80 120 µA IPD Input Pull-down Current Note 3 — 120 150 µA IOLK Tristate Leakage Output Note 4 — — ±10 µA Notes 2, 3, 5 — 8 10 pF Note 6 — 13.5 15 pF CIN 1. 2. 3. 4. 5. 6. Input Capacitance Note 1 Min. ILK Applies to clock reference inputs when termination ‘open’. Applies to TDI, TMS inputs. Applies to REFSEL, PS0, PS1, GOE, SGATE and PLL_BYPASS. Applies to all logic types when in tristated mode. Applies to OEX, OEY, TCK, RESET inputs. Applies to REFA+, REFA-, REFB+, REFB-, FBKA+, FBKA-, FBKB+, FBKB-. 6 Lattice Semiconductor ispClock5600 Family Data Sheet Switching Characteristics – Timing Adders for I/O Modes Adder Type Description Min. Typ. Max. Units tIOI Input Adders2 LVTTL_in Using LVTTL Standard 0 0 0 ns LVCMOS18_in Using LVCMOS 1.8V Standard 0.20 0.45 0.70 ns LVCMOS25_in Using LVCMOS 2.5V Standard 0 0 0 ns LVCMOS33_in Using LVCMOS 3.3V Standard 0 0 0 ns SSTL2_in Using SSTL2 Standard 1.15 1.35 1.60 ns SSTL3_in Using SSTL3 Standard 1.15 1.35 1.60 ns HSTL_in Using HSTL Standard 1.15 1.35 1.60 ns LVDS_in Using LVDS Standard 1.15 1.35 1.60 ns LVPECL_in Using LVPECL Standard 1.15 1.35 1.60 ns tIOO Output Adders1, 3 LVTTL_out Output Configured as LVTTL Buffer -0.10 0.15 0.45 ns LVCMOS18_out Output Configured as LVCMOS 1.8V Buffer -0.15 0.15 0.55 ns LVCMOS25_out Output Configured as LVCMOS 2.5V Buffer -0.10 0.15 0.45 ns LVCMOS33_out Output Configured as LVCMOS 3.3V Buffer -0.10 0.15 0.45 ns SSTL2_out Output Configured as SSTL2 Buffer -0.10 0.15 0.45 ns SSTL3_out Output Configured as SSTL3 Buffer -0.10 0.15 0.45 ns HSTL_out Output Configured as HSTL Buffer 0 0.15 0.45 ns LVDS_out Output Configured as LVDS Buffer 0 0 0 ns LVPECL_out Output Configured as LVPECL Buffer 0 0 0 ns tIOS Output Slew Rate Adders1 Slew_1 Output Slew_1 (Fastest) — 0 — ps Slew_2 Output Slew_2 — 330 — ps Slew_3 Output Slew_3 — 660 — ps Slew_4 Output Slew_4 (Slowest) — 1320 — ps 1. Measured under standard output load conditions – see Figures 3-5. 2. All input adders referenced to LVTTL. 3. All output adders referenced to LVPECL. Output Rise and Fall Times – Typical Values1, 2 Slew 1 (Fastest) Output Type Slew 2 Slew 3 Slew 4 (Slowest) tR tF tR tF tR tF tR tF Units LVTTL 0.65 0.45 0.85 0.60 1.20 0.90 1.75 1.30 ns LVCMOS 1.8V 0.90 0.40 1.05 0.50 1.40 0.80 2.00 1.20 ns LVCMOS 2.5V 0.70 0.40 0.90 0.55 1.20 0.85 1.80 1.20 ns LVCMOS 3.3V 0.65 0.45 0.85 0.60 1.20 0.90 1.75 1.30 ns SSTL2 0.65 0.40 0.90 0.60 1.35 0.85 2.30 1.40 ns SSTL3 0.65 0.40 0.90 0.60 1.35 0.85 2.30 1.40 ns HSTL 0.85 0.30 1.00 0.50 1.50 0.70 2.55 1.10 ns 0.25 0.20 — — — — — — ns 0.20 0.20 — — — — — — ns LVDS 3 LVPECL3 1. See Figures 3-5 for test conditions. 2. Measured between 20% and 80% points. 3. Only the ‘fastest’ slew rate is available in LVDS and LVPECL modes. 7 Lattice Semiconductor ispClock5600 Family Data Sheet Output Test Loads Figures 3-5 show the equivalent termination loads used to measure rise/fall times, output timing adders and other selected parameters as noted in the various tables of this data sheet. Figure 3. CMOS Termination Load SCOPE 50Ω/3" 50Ω/36" ispCLOCK 950Ω 50Ω 5pF Zo = 50Ω Figure 4. HSTL/SSTL Termination Load VTERM SCOPE 50Ω 50Ω/3" 50Ω/36" 950Ω ispCLOCK 50Ω 5pF Zo = HSTL: ~20Ω SSTL: 40Ω Figure 5. LVDS/LVPECL Termination Load Interface Circuit 50Ω/3" 50Ω/1" 3pF (parasitic) 34Ω 0.1U 50Ω/36" SCOPE ChA 5pF ChB 50Ω 5pF 33.2Ω ispCLOCK 50Ω/3" 50Ω/1" 44.2Ω 34Ω 33.2Ω 3pF (parasitic) 0.1U 50Ω/36" 50Ω 8 Lattice Semiconductor ispClock5600 Family Data Sheet Programmable Input and Output Termination Characteristics Symbol RIN ROUT Parameter Input Resistance Output Resistance Min. Typ. Max. Rin=40Ω setting Conditions 36 — 44 Rin=45Ω setting 40.5 — 49.5 Rin=50Ω setting 45 — 55 Rin=55Ω setting 49.5 — 60.5 Rin=60Ω setting 54 — 66 Rin=65Ω setting 59 — 71.5 Rin=70Ω setting 61 — 77 Rout≈20Ω setting, VCCO=1.5V — 27 — Rout≈20Ω setting, VCCO=1.8V — 22 — Rout≈20Ω setting, VCCO=2.5V — 20 — Rout≈20Ω setting, VCCO=3.3V — 18 — Rout=40Ω setting 34 — 47 Rout=45Ω setting 38 — 55 Rout=50Ω setting 43 — 61 Rout=55Ω setting 47 — 67 Rout=60Ω setting 51 — 72 Rout=65Ω setting 55 — 78 Rout=70Ω setting 61 — 83 9 Units Ω Ω Lattice Semiconductor ispClock5600 Family Data Sheet Performance Characteristics – PLL Symbol Min. Typ. Max. Units fREF, fFBK Reference and feedback input frequency range 10 — 320 MHz tCLOCKHI, tCLOCKLO Reference and feedback input clock HIGH and LOW times 1.25 — — ns tRINP, tFINP Reference and feedback input rise and fall times — — 5 ns MDIV M-divider range 1 — 32 NDIV N-Divider range 1 — 32 fPFD Phase detector input frequency range2 10 — 320 MHz fVCO VCO operating frequency 320 — 640 MHz VDIV Output Divider range Even integer values only 2 — 64 Fine Skew Mode, fVCO = 640MHz 10 — 320 MHz Coarse Skew Mode, fVCO = 640MHz 5 — 160 MHz 1000 cycle sample3 — 45 60 ps (p-p) 10 ps (RMS) fOUT tJIT (cc) tJIT (per) Parameter Output frequency range Conditions 1 Output adjacent-cycle jitter Output period jitter Measured between 20% and 80% levels 10000 cycle sample 3 — 8 PFD input frequency ≥100MHz7 -375 -75 225 ps PFD input frequency <100MHz7 -37.5 — 22.5 mUI6 tφ Static phase offset tDELAY Reference clock to output delay Internal feedback mode7 DCERR Output duty cycle error (see Table 3 for nominal values)4 tPDBYPASS Reference clock to output propagation delay tL PLL Lock time PSR Power supply rejection, period jitter vs. power supply noise 0.3 0.45 0.6 ns Output type LVDS, VCCO = 3.3V5 — — 260 ps Output type LVCMOS 3.3V5 fOUT >100 MHz — — 300 ps M=1, V=2 — 6 — ns From Power-up event — 150 500 µs From Reset event — 15 50 µs fIN = fOUT = 100MHz VCCA = VCCD = VCCO modulated with 100kHz sinusoidal stimulus — 0.05 — 1. 2. 3. 4. ps(RMS) mV(p-p) In PLL Bypass mode (PLL_BYPASS = HIGH), output will support frequencies down to 0Hz (divider chain is a fully static design). Dividers should be set so that they provide the phase detector with signals of 10MHz or greater for loop stability. fIN = fOUT = 100 MHz, M = N = 1, V = 6, output type LVPECL. Variation in duty cycle expressed in ps. To obtain duty cycle percentage error (%ERR) for a given output frequency (fOUT), %ERR = 100 x fOUT x DCERR. 5. See Figures 3-5 for output loads. 6. milli-Unit Interval 7. Input and outputs LVPECL mode 10 Lattice Semiconductor ispClock5600 Family Data Sheet Timing Specifications Skew Matching Symbol tSKEW Parameter Conditions Between any two identically configured and loaded outputs regardless of bank. Output-output Skew Min. Typ. Max. Units — — 50 ps Programmable Skew Control Symbol Parameter tSKRANGE Skew Control Range1 SKSTEPS Skew Steps per range Min. Typ. Max. Fine Skew Mode, fVCO = 320 MHz Conditions — 5.86 — Fine Skew Mode, fVCO = 640 MHz — 2.93 — Coarse Skew Mode, fVCO = 320 MHz — 11.72 — Coarse Skew Mode, fVCO = 640 MHz tSKSTEP tSKERR Skew Step Size2 Skew Time Error3 — 5.86 — — 16 — Fine Skew Mode, fVCO = 320 MHz — 390 — Fine Skew Mode, fVCO = 640 MHz — 195 — Coarse Skew Mode, fVCO = 320 MHz — 780 — Coarse Skew Mode, fVCO = 640 MHz — 390 — Fine skew mode — 30 — Coarse skew mode — 50 — Units ns ps ps 1. Skew control range is a function of VCO frequency (fVCO). In fine skew mode TSKRANGE = 15/(8 x fVCO). In coarse skew mode TSKRANGE = 15/(4 x fVCO). 2. Skew step size is a function of VCO frequency (fVCO). In fine skew mode TSKSTEP = 1/(8 x fVCO). In coarse skew mode TSKSTEP = 1/(4 x fVCO). 3. Only applicable to outputs with non-zero skew settings. Control Functions Symbol Parameter Conditions Min. Typ. Max. Units tDIS/OE Delay Time, OEX or OEY to Output Disabled/ Enabled — 10 20 ns tDIS/GOE Delay Time, GOE to Output Disabled/Enabled — 10 20 ns tSUSGATE Setup Time, SGATE to Output Clock Start/ Stop 3 — — cycles1 tPLL_RSTW PLL Reset Pulse Width2 1 — — ms 3 tRSTW Logic Reset Pulse Width tHPS_RST Hold time for RESET past change in PS[0..1] 1. Output clock cycles for the particular output being controlled. 2. Will completely reset PLL. 3. Will only reset digital logic. Figure 6. RESET and Profile Select Timing PS[0..1] tHPS_RST RESET tPLL_RSTW 11 20 — — ns 20 — — ns Lattice Semiconductor ispClock5600 Family Data Sheet Timing Specifications (Cont.) Boundary Scan Logic Min. Max. Units tBTCP Symbol TCK (BSCAN Test) Clock Cycle Parameter 40 — ns tBTCH TCK (BSCAN Test) Pulse Width High 20 — ns tBTCL TCK (BSCAN Test) Pulse Width Low 20 — ns tBTSU TCK (BSCAN Test) Setup Time 8 — ns tBTH TCK (BSCAN Test) Hold Time 10 — ns tBRF TCK (BSCAN Test) Rise and Fall Rate 50 — mV/ns tBTCO TAP Controller Falling Edge of Clock to Valid Output — 10 ns tBTOZ TAP Controller Falling Edge of Clock to Data Output Disable — 10 ns tBTVO TAP Controller Falling Edge of Clock to Data Output Enable — 10 ns tBVTCPSU BSCAN Test Capture Register Setup Time 8 — ns tBTCPH BSCAN Test Capture Register Hold Time 10 — ns tBTUCO BSCAN Test Update Register, Falling Edge of Clock to Valid Output — 25 ns tBTUOZ BSCAN Test Update Register, Falling Edge of Clock to Output Disable — 25 ns tBTUOV BSCAN Test Update Register, Falling Edge of Clock to Output Enable — 25 ns JTAG Interface and Programming Mode Min. Typ. Max. Units fMAX Symbol Maximum TCK Clock Frequency Parameter Condition — — 25 MHz tCKH TCK Clock Pulse Width, High 20 — — ns tCKL TCK Clock Pulse Width, Low 20 — — ns tISPEN Program Enable Delay Time 15 — — µs tISPDIS Program Disable Delay Time 30 — — µs tHVDIS High Voltage Discharge Time, Program 30 — — µs tHVDIS High Voltage Discharge Time, Erase 200 — — µs tCEN Falling Edge of TCK to TDO Active — — 15 ns tCDIS Falling Edge of TCK to TDO Disable — — 15 ns tSU1 Setup Time 8 — — ns tH Hold Time 10 — — ns tCO Falling Edge of TCK to Valid Output — — 15 ns tPWV Verify Pulse Width 30 — — µs tPWP Programming Pulse Width 10 — — ms tBEW Bulk Erase Pulse Width 200 — — ms 12 Lattice Semiconductor ispClock5600 Family Data Sheet Timing Diagrams Figure 7. Erase (User Erase or Erase All) Timing Diagram Clock to Shift-IR state and shift in the Discharge Instruction, then clock to the Run-Test/Idle state VIH TMS VIL tSU1 tH tSU1 tCKH VIH tSU1 tH tGKL tH tBEW tCKH TCK VIL State Update-IR Run-Test/Idle (Erase) Select-DR Scan The clock (TCK) must be able to run free with TMS = VIL tSU1 tSU1 tH tCKH tSU1 tH tGKL tH tCKH tCKH tSU2 Specified by the Data Sheet Run-Test/Idle (Discharge) The clock (TCK) must be able to run free with TMS = VIL Figure 8. Programming Timing Diagram TMS VIL tSU1 tH tSU1 tCKH VIH tH tSU1 tCKL tH tPWP tCKH TCK VIL State Update-IR Run-Test/Idle (Program) Select-DR Scan The clock (TCK) must be able to run free with TMS = VIL Clock to Shift-IR state and shift in the next Instruction, which will stop the discharge process VIH tSU1 tH tCKH tSU1 tH tCKL tCKH Update-IR VIH TMS VIL tSU1 tH tCKH tSU1 tH tSU1 tCKL tH tPWV tCKH VIH TCK VIL State Update-IR Run-Test/Idle (Program) Select-DR Scan The clock (TCK) must be able to run free with TMS=VIL Clock to Shift-IR state and shift in the next Instruction Figure 9. Verify Timing Diagram tSU1 tH tCKH tSU1 tH tCKL tCKH Update-IR Figure 10. Discharge Timing Diagram tHVDIS (Actual) TMS VIL tSU1 tH tCKH tSU1 tCKL tH tSU1 tPWP or tBEW tH tCKH VIH TCK VIL State Update-IR Run-Test/Idle (Erase or Program) Select-DR Scan 13 Clock to Shift-IR state and shift in the Verify Instruction, then clock to the Run-Test/Idle state VIH tSU1 tH tCKH tSU1 tCKL tH tSU1 tPWV tCKH Actual tPWV Specified by the Data Sheet Run-Test/Idle (Verify) tH tCKH Lattice Semiconductor ispClock5600 Family Data Sheet Typical Performance Characteristics ICCD vs. fVCO (Normalized to 640MHz) ICCO vs. Output Frequency (LVCMOS 3.3V, Normalized to 320MHz) 1.2 Normalized ICCO Current Normalized ICCD Current 1.2 1 0.8 0.6 0.4 0.2 0 300 1 0.8 0.6 0.4 0.2 0 400 500 600 700 0 fVCO (MHz) 50 100 150 200 250 300 350 Output Frequency (MHz) Typical Skew Error vs. Setting (Skew Mode = FINE, fVCO = 600MHz) 100 Error vs. Ideal (ps) 75 50 25 0 -25 -50 -75 -100 0 3 6 9 12 15 Skew Setting # Detailed Description PLL Subsystem The ispClock5600 provides an integral phase-locked-loop (PLL) which may be used to generate output clock signals at lower, higher, or the same frequency as a user-supplied input reference signal. The core functions of the PLL are an edge-sensitive phase detector, a programmable loop filter, and a high-speed voltage-controlled oscillator (VCO). Additionally, a set of programmable input, output and feedback dividers (M, N, V[1..5]) is provided to support the synthesis of different output frequencies. Phase/Frequency Detector The ispClock5600 provides an edge-sensitive phase/frequency detector (PFD), which means that the device will function properly over a wide range of input clock reference duty cycles. It is only necessary that the input reference clock meet specified minimum HIGH and LOW times (tCLOCKHI, tCLOCKLO) for it to be properly recognized by the PFD. The PFD’s output is of a classical charge-pump type, outputting charge packets which are then integrated by the PLL‘s loop filter. A lock-detection feature is also associated with the PFD. When the ispClock5600 is in a LOCKED state, the LOCK output pin goes LOW. The lock detector has two operating modes; phase lock mode and frequency lock mode. In phase-lock mode, the LOCK signal is asserted if the phases of the reference and feedback signals match, whereas in frequency-lock mode the LOCK signal is asserted when the frequencies of the feedback and reference signals 14 Lattice Semiconductor ispClock5600 Family Data Sheet match. The option of which mode to use is programmable and may be set using PAC-Designer software (available from the Lattice web site at www.latticesemi.com). In phase-lock mode the lock detector asserts the LOCK signal as soon as a lock condition is determined. In frequency-lock mode, however, the PLL must be in a locked condition for a set number of phase detector cycles before the LOCK signal will be asserted. The number of cycles required before asserting the LOCK signal in frequency-lock mode can be set from 16 through 256. When the lock condition is lost the LOCK signal will be de-asserted immediately in both phase-lock and frequencylock detection modes. In frequency-lock mode, however, if the input reference signal is stopped, the LOCK output may continue to be asserted. In phase-lock mode, a loss of the input reference signal will always result in de-assertion of the LOCK output. Loop Filter A simplified schematic for the ispClock5600 loop filter is shown in Figure 11. The filter’s capacitors are fixed, and the response is controlled by setting the value of the phase-detector’s output current source’s and the value of the variable resistor. The phase detector output current has 14 possible settings, ranging from 3µA to 55µA, while the resistor may be set to any one of six values ranging from 2.3K to 9.3K. This provides a total of 84 unique I-R combinations which may be selected. Figure 11. ispClock5600 Loop Filter (Simplified) Phase Detector From M-divider I To VCO I From N-divider C1 R C2 Because the selection of an optimal PLL loop filter can be a daunting task, PAC-Designer offers a set of default filter settings which will provide acceptable performance for most applications. The primary criterion for selecting one of these settings is the total division factor used in the feedback path, or the ratio between the VCO output frequency and the frequency output by the N feedback divider (N x Vfeedback). Table 2 lists these default settings and conditions under which they should be used. 15 Lattice Semiconductor ispClock5600 Family Data Sheet Table 2. PAC-Designer Recommended Loop Filter Settings N x VFBK I (µA) R (kΩ) 2 to 8 5 2.3 10 7 2.3 12 to 14 9 2.3 16 11 2.3 18 to 20 13 2.3 22 15 2.3 24 to 26 17 2.3 28 19 2.3 30 21 2.3 32 to 64 22 2.3 Note that the choice of loop filter parameters can have significant effects on settling time, output jitter, and whether the PLL will be fundamentally stable and be able to lock to an incoming signal. The values recommended in Table 2 were chosen to provide maximum loop stability while still providing exceptional jitter performance. Please note that when the skew mode is set to ‘coarse’, the effective value of NxV must be considered to have doubled. Refer to the section titled ‘Coarse Skew Mode’ on page 28 for further details. The PLL’s loop bandwidth is a function of both the divider configuration and the loop filter settings. Figure 12 shows the loop bandwidth as a function of the total feedback division ratio (N x VFBK). For each NxV feedback divider point in this plot, the PLL loop filter was set to the corresponding value recommended in Table 2. The use of non-recommended loop filter settings may result in significantly different bandwidths for a given NxV divider setting. Figure 12. PLL Loop Bandwidth vs. Feedback Divider Setting (nominal) PLL Loop Bandwidth vs. Feedback Divider Setting* (Typical) 2 Loop Bandwidth (MHz) 1.75 1.5 1.25 1 0.75 0.5 0.25 0 0 16 32 48 64 N x V Feedback Division Product *loop filter configured to recommended setting VCO The ispClock5600 provides an internal VCO which provides an output frequency ranging from 320MHz to 640MHz. The VCO is implemented using differential circuit design techniques which minimize the influence of power supply noise on measured output jitter. The VCO is also used to generate skews as a function of the total VCO period. Using the VCO as the basis for controlling output skew allows for highly precise and consistent skew generation, both from device-to-device, as well as channel-to-channel within the same device. 16 Lattice Semiconductor ispClock5600 Family Data Sheet M, N, and V Dividers The ispClock5600 incorporates a set of programmable dividers which provide the ability to synthesize output frequencies differing from that of the reference clock input. The input, or M divider prescales the input reference frequency, and can be programmed with integer values over the range of 1 to 32. To achieve low levels of output jitter, it is best to use the smallest M divider value possible. The feedback, or N divider prescales the feedback frequency and like the M divider, can also be programmed with integer values ranging from 1 to 32. Each one of the five output, or V dividers can be independently programmed to provide even division ratios ranging from 2 to 64. When the PLL is selected (PLL_BYPASS=LOW) and locked, the output frequency of each V divider (fk) may be calculated as: fk = fref N x Vfbk M x Vk (1) where fk is the frequency of V divider k fref is the input reference frequency M and N are the input and feedback divider settings Vfbk is the setting of the V divider used to close the PLL feedback path Vk is the setting of the V divider used to provide output k Note that because the feedback may be taken from any V divider, Vk and Vfbk may refer to the same divider. Because the VCO has an operating frequency range spanning 320 MHz to 640 MHz, and the V dividers provide division ratios from 2 to 64, the ispClock5600 can generate output signals ranging from 5MHz to 320 MHz. For performance and stability reasons, however, there are several constraints which should be followed when selecting divider values: • Use the smallest feasible value for the M divider • The output frequency from the M (and N) divider should be greater or equal to 10 MHz. • The product of the N divider and the V divider used to close the PLL’s feedback loop should be less than or equal to 64 (N x Vfbk ≤ 64) Output Duty Cycle The ispClock5600’s output duty cycle varies as a function of the V divider used to generate that output. If the Vdivider setting is either 2 or a multiple of 4, the nominal output duty cycle will be exactly 50%. All other V divider settings will result in non-50% output duty cycles. Table 3 summarizes the nominal output duty cycle as a function of the V divider setting. Note that if the output is inverted, the duty cycle will be equal to 100%-DC%, where DC% is the duty cycle indicated in the table. For example, with a V divider of 14, the non-inverted duty cycle from Table 3 will be 43%. For an inverted output, the duty cycle will be 100%-43% or 57%. 17 Lattice Semiconductor ispClock5600 Family Data Sheet Table 3. Nominal Output Duty Cycle vs. V-Divider Setting Divider Settings with 50% Output Duty Cycle V Divider Settings with Non-50% Output Duty Cycles V DC% 2 DC% 6 33 4 10 40 8 14 43 12 18 44 16 22 45 20 26 46 24 30 47 34 47 38 47 36 42 48 40 46 48 44 50 48 48 54 48 52 58 48 56 62 48 28 32 50 60 64 PLL_BYPASS Mode The PLL_BYPASS mode is provided so that input reference signals can be coupled through to the outputs without using the PLL functions. When PLL_BYPASS mode is enabled (PLL_BYPASS=HIGH), the output of the M divider is routed directly to the inputs of the V dividers. In PLL_BYPASS mode, the nominal values of the V dividers are halved, so that they provide division ratios ranging from 1 to 32. The output frequency for a given V divider (fk) will be determined by fk = fref x 2 M x Vk (2) Please note that PLL_BYPASS mode is provided primarily for testing purposes. When PLL_BYPASS mode is enabled, features such as lock detect and skew generation are unavailable. Reference and External Feedback Inputs The ispClock5600 provide sets of configurable, internally-terminated inputs for both clock reference and feedback signals. In normal operation, the one of the clock reference input pairs (REFA+/- or REFB+/-) is used as a clock input. The external feedback inputs make it possible to sample an output signal at the point of delivery. This makes it possible to provide output clocks which have very low skews in relation to the reference clock regardless of loading effects. The ispClock5610 provides one input signal pair for reference input and one input pair for external feedback, while the ispClock5620 provides two pairs for reference signals and two pairs for feedback. To select between reference and feedback inputs, the ispClock5620 provides two CMOS-compatible digital inputs called REFSEL and FBKSEL. Table 4 shows the behavior of these two control inputs. 18 Lattice Semiconductor ispClock5600 Family Data Sheet Table 4. REFSEL and FBKSEL Operation for ispClock5620 • • • • • • • • • • REFSEL Selected Input Pair FBKSEL Selected Input Pair 0 REFA+/- 0 FBKA+/- 1 REFB+/- 1 FBKB+/- LVTTL (3.3V) LVCMOS (1.8V, 2.5V, 3.3V) SSTL2 SSTL3 HSTL Differential SSTL2 Differential SSTL3 Differential HSTL LVDS LVPECL (differential, 3.3V) Each input also features internal programmable termination resistors, as shown in Figure 13. Note that all reference inputs (REFA+, REFA-, REFB+, REFB-) terminate to the REFVTT pin, while all feedback inputs (FBKA+, FBKA-, FBKB+, FBKB-) terminate to the FBKVTT pin. Figure 13. ispClock5600 Clock Reference and Feedback Input Structure (REFA+/- Pair Shown) ispClock5600 Single-ended Receiver REFA+ To Internal Logic REFA- Differential Receiver RT RT REFVTT The following usage guidelines are suggested for interfacing to supported logic families. LVTTL (3.3V), LVCMOS (1.8V, 2.5V, 3.3V) The receiver should be set to LVCMOS or LVTTL mode, and the input signal should be connected to the ‘+’ terminal of the input pair (e.g. REFA+). The ‘-’ input terminal should be left floating. CMOS transmission lines are generally source terminated, so all termination resistors should be set to the OPEN state. Figure 14 shows the proper configuration. Please note that because switching thresholds are different for LVCMOS running at 1.8V, there is a separate configuration setting for this particular standard. 19 Lattice Semiconductor ispClock5600 Family Data Sheet Figure 14. LVCMOS/LVTTL Input Receiver Configuration ispClock5600 Single-ended Receiver Signal In REFA+ No Connect REFART OPEN No Connect REFVTT HSTL, SSTL2, SSTL3 The receiver should be set to HSTL/SSTL mode, and the input signal should be fed into the ‘+’ terminal of the input pair. The ‘-’ input terminal should be tied to the appropriate VREF value, and the associated REFVTT or FBKVTT terminal should be tied to a VTT termination supply. The positive input’s terminating resistor should be engaged and set to 50Ω. Figure 15 shows an appropriate configuration. Refer to the “Recommended Operating Conditions Supported Logic Standards” table in this data sheet for suitable values of VREF and VTT. One important point to note is that the termination supplies must have low impedance and be able to both source and sink current without experiencing fluctuations. These requirements generally preclude the use of a resistive divider network, which has an impedance comparable to the resistors used, or of commodity-type linear voltage regulators, which can only source current. The best way to develop the necessary termination voltages is with a regulator specifically designed for this purpose. Because SSTL and HSTL logic is commonly used for high-performance memory busses, a suitable termination voltage supply is often already available in the system. Figure 15. SSTL2, SSTL3, HSTL Receiver Configuration ispClock5600 Signal In Differential Receiver REFA+ VREF IN REFA50 VTT CLOSED OPEN REFVTT 20 Lattice Semiconductor ispClock5600 Family Data Sheet Differential HSTL and SSTL HSTL and SSTL are sometimes used in a differential form, especially for distributing clocks in high-speed memory systems. Figure 16 shows how ispClock5600 reference input should be configured for accepting these standards. The major difference between differential and single-ended forms of these logic standards is that in the differential case, the REFA- input is used as a signal input, not a reference level, and that both terminating resistors are engaged and set to 50Ω. Figure 16. Differential HSTL/SSTL Receiver Configuration ispClock5600 +Signal In Differential Receiver REFA+ -Signal In REFA50 50 VTT CLOSED CLOSED REFVTT LVDS/Differential LVPECL The receiver should be set to LVDS or LVPECL mode as required and both termination resistors should be engaged and set to 50Ω. The associated REFVTT or FBKVTT pin, however, should be left unconnected. This creates a floating 100Ω differential termination resistance across the input terminals. The LVDS termination configuration is shown in Figure 17. Figure 17. LVDS Input Receiver Configuration ispClock5600 Differential Receiver +Signal In LVDS Driver REFA+ -Signal In REFA50 50 CLOSED No Connect REFVTT 21 CLOSED Lattice Semiconductor ispClock5600 Family Data Sheet Note that while a floating 100Ω resistor forms a complete termination for an LVDS signal line, additional circuitry may be required to satisfactorily terminate a differential LVPECL signal. This is because a true bipolar LVPECL output driver typically requires an external DC ‘pull-down’ path to a VTERM termination voltage (typically VCC-2V) to properly bias its open emitter output stage. When interfacing to an LVPECL input signal, the ispClock5600’s internal termination resistors should not be used for this pull-down function, as they may be damaged from excessive current. The pull-down should be implemented with external resistors placed close to the LVPECL driver (Figure 18) Figure 18. LVPECL Input Receiver Configuration ispClock5600 Differential Receiver +Signal In REFA+ LVPECL Driver -Signal In REFARPD RPD 50 50 CLOSED VTERM CLOSED No Connect REFVTT Please note that while the above discussions specify using 50Ω termination impedances, the actual impedance required to properly terminate the transmission line and maintain good signal integrity may vary from this ideal. The actual impedance required will be a function of the driver used to generate the signal and the transmission medium used (PCB traces, connectors and cabling). The ispClock5600’s ability to adjust input impedance over a range of 40Ω to 70Ω allows the user to adapt his circuit to non-ideal behaviors from the rest of the system without having to swap out components. Output Drivers The ispClock5600 provide banks of configurable, internally-terminated high-speed dual-output line drivers. The ispClock5610 provides five driver banks, while the ispClock5620 provides ten. Each of these driver banks may be configured to provide either a single differential output signal, or a pair of single-ended output signals. Programmable internal source-series termination allows the ispClock5600 to be matched to transmission lines with impedances ranging from 40 to 70 Ohms. The outputs may be independently enabled or disabled, either from E2CMOS configuration or by external control lines. Additionally, each can be independently programmed to provide a fixed amount of signal delay or skew, allowing the user to compensate for the effects of unequal PCB trace lengths or loading effects. Figure 19 shows a block diagram of a typical ispClock5600 output driver bank and associated skew control. Because of the high edge rates which can be generated by the ispClock5600’s clock output drivers, the VCCO power supply pin for each output bank should be individually bypassed. Low ESR capacitors with values ranging from 0.01 to 0.1 µF may be used for this purpose. Each bypass capacitor should be placed as close to its respective output bank power pins (VCCO and GNDO) pins as is possible to minimize interconnect length and associated parasitic inductances. 22 Lattice Semiconductor ispClock5600 Family Data Sheet In the case where an output bank is unused, the associated VCCO pin may be either left floating or tied to ground to reduce quiescent power consumption. We recommend, however, that all unused VCCO pins be tied to ground where possible. All GND0 pins must be tied to ground, regardless of whether or not the associated bank is used. Figure 19. ispClock5600 Output Driver and Skew Control Skew Adjust OE Control Single-ended ‘A’ output Driver From V-Dividers BANKxA OE Control Differential (PECL/LVDS) Driver OE Control Skew Adjust BANKxB Single-ended ‘B’ output Driver Each of the ispClock5600’s output driver banks can be configured to support the following logic outputs: • • • • • • • LVTTL LVCMOS (1.8V, 2.5V, 3.3V) SSTL2 SSTL3 HSTL LVDS Differential LVPECL (3.3V) To provide LVTTL, LVCMOS, SSTL2, SSTL3, and HSTL outputs, the CMOS output drivers in each bank are enabled. These circuits provide logic outputs which swing from ground to the VCCO supply rail. The choice of VCCO to be supplied to a given bank is determined by the logic standard to which that bank is configured. Because each pair of outputs has its own VCCO supply pin, each bank can be independently configured to support a different logic standard. Note that the two outputs associated with a bank must necessarily be configured to the same logic standard. The source impedance of each of the two outputs in each bank may be independently set over a range of 40Ω to 70Ω in 5Ω steps. A low impedance option (≈20Ω) is also provided for cases where low source termination is desired on a given output. Control of output slew rate is also provided in LVTTL, LVCMOS, SSTL2, SSTL3, and HSTL output modes. Four output slew-rate settings are provided, as specified in the “Output Rise Times” and “Output Fall Times” tables in this data sheet. To provide LVDS and differential LVPECL outputs, a separate internal driver is used which provides the correct LVDS or LVPECL logic levels when operating from a 3.3V VCCO. Because both LVDS and differential LVPECL transmission lines are normally terminated with a single 100Ω resistor between the ‘+’ and ‘-’ signal lines at the far 23 Lattice Semiconductor ispClock5600 Family Data Sheet end, the ispClock5600’s internal termination resistors are not available in these modes. Also note that output slewrate control is not available in LVDS or LVPECL mode, and that these drivers always operate at a fixed slew-rate. Polarity control (true/inverted) is available for all output drivers. In the case of single-ended output standards, the polarity of each of the two output signals from each bank may be controlled independently. In the case of differential output standards, the polarity of the differential pair may be selected. Suggested Usage Figure 20 shows a typical configuration for the ispClock5600’s output driver when configured to drive an LVTTL or LVCMOS load. The ispClock5600’s output impedance should be set to match the characteristic impedance of the transmission line being driven. The far end of the transmission line should be left open, with no termination resistors. Figure 20. Configuration for LVTTL/LVCMOS Output Modes ispClock5600 LVCMOS/LVTTL Mode Zo Ro = Zo LVCMOS/LVTTL Receiver Figure 21 shows a typical configuration for the ispClock5600’s output driver when configured to drive SSTL2, SSTL3, or HSTL loads. The ispClock5600’s output impedance should be set to 40Ω for driving SSTL2 or SSTL3 loads and to the ≈20Ω setting for driving HSTL. The far end of the transmission line must be terminated to an appropriate VTT voltage through a 50Ω resistor. Figure 21. Configuration for SSTL2, SSTL3, and HSTL Output Modes VTT ispClock5600 RT=50 SSTL/HSTL Mode SSTL/HSTL Receiver Zo=50Ω Ro : 40 (SSTL) ≈20Ω (HSTL) VREF While supporting single-ended HSTL and SSTL outputs, the ispClock5600 does not support differential HSTL or SSTL outputs. Although complementary HSTL and SSTL signals may be generated by using both an inverted output and a non-inverted output similarly configured, the resulting signal pair may not meet the JEDEC differential HSTL specifications for common mode voltage or crossover voltage. Figure 22 shows a typical configuration for the ispClock5600’s output driver when configured to drive LVDS or differential LVPECL loads. The ispClock5600’s output impedance is disengaged when the driver is set to LVDS or 24 Lattice Semiconductor ispClock5600 Family Data Sheet LVPECL mode. The far end of the transmission line must be terminated with a 100Ω resistor across the two signal lines. Figure 22. Configuration for LVDS and LVPECL Output Modes LVDS/LVPECL mode LVDS/PECL Receiver Zo=50Ω RT=100 Zo=50Ω ispClock5600 Note that when in LVPECL output mode, the ispClock5600’s output driver provides an internal pull-down, unlike a typical bipolar LVPECL driver. For this reason no external pull-down resistors are necessary and the driver may be terminated with a single 100Ω resistor across the signal lines. For proper operation, pull-down resistors should NOT be used with the ispClock5600’s LVPECL output mode. Thermal Management In applications where a majority of the ispClock5610 or ispClock5620’s outputs are active and operating at or near maximum output frequency (320 MHz), package thermal limitations may need to be considered to ensure a successful design. Thermal characteristics of the packages employed by Lattice Semiconductor may be found in the document Thermal Management which may be obtained at www.latticesemi.com. The maximum current consumption of the digital and analog core circuitry is approximately 167mA worst case (ICCD + ICCA), and each of the output banks may draw up to 35mA worst case (LVCMOS 3.3V, CL=18pF, fOUT=320 MHz, both outputs in each bank enabled). This results in a total device dissipation: PDMAX = 3.3V x (10 x 35mA + 167mA) = 1.7W (3) With a maximum recommended operating junction temperature (TJOP) of 115°C for an industrial grade device, the maximum allowable ambient temperature (TAMAX) can be estimated as TAMAX = TJOP - PDMAX x ΘJA = 115°C - 1.7W x 35°C/W = 55°C (4) where ΘJA = 35 °C/W in still air for the ispClock5620’s TQFP100 package. The above analysis represents the worst-case scenario. Significant improvement in maximum ambient operating temperature can be realized with additional cooling. Providing a 200 LFM (Linear Feet per Minute) airflow reduces ΘJA to 29°C/W, which results in a maximum ambient operating temperature of 66°C. In practice, however, the absolute worst-case situation will be relatively rare, as not all outputs may be running at maximum output frequency in a given application. Additionally, if the internal VCO is operating at less than its maximum frequency (640MHz), it requires less current on the VCCD pin. In these situations, one can estimate the effective ICCO for each bank and the effective ICCD for the digital core functions based on output frequency and VCO frequency. Normalized curves relating current to operating frequency for these parameters may be found in the Typical Performance Characteristics section. While it is possible to perform detailed calculations to estimate the maximum ambient operating temperature from operating conditions, some simpler rule-of-thumb guidance can also be obtained through the derating curves shown in Figure 23. The curves in Figure 23a show the maximum ambient operating temperature permitted when operating a given number of output banks at the maximum output frequency (320MHz). Note that it is assumed that both outputs in each bank are active. 25 Lattice Semiconductor ispClock5600 Family Data Sheet Figure 23. Maximum Ambient Temperature vs. Number of Active Output Banks Temperature Derating Curves (Outputs LVCMOS 3.3V, fOUT=320 MHz) Temperature Derating Curves (Outputs LVCMOS 3.3V, fOUT=100 MHz) 90 Maximum Ambient Temp. °C Maximum Ambient Temp. °C 90 80 70 60 50 40 0 2 4 6 8 # Active Output Banks 80 70 60 50 40 0 10 2 4 6 8 # Active Output Banks Maximum Ambient Temp. °C (a) 10 (b) Temperature Derating Curves (Outputs LVDS, fOUT=320 MHz) 90 5620 Commercial 5620 Industrial 80 5610 Commericial 5610 Industrial 70 60 50 40 0 2 4 6 8 10 # Active Output Banks (c) Figure 23b shows another derating curve, derived under the assumption that the output frequency is 100MHz. For many applications, 100MHz outputs will be a more realistic scenario. Comparing the maximum temperature limits of Figure 23b with Figure 23a, one can see that significantly higher operating temperatures are possible in LVCMOS 3.3V output mode with more outputs at 100MHz than at 320MHz. The examples above used LVCMOS 3.3V logic, which represents the maximum power dissipation case at higher frequencies. For optimal operation at very high frequencies (> 150 MHz) LVDS will often be the best choice from a signal integrity standpoint. For LVDS-configured outputs, the maximum ICCO current consumption per bank is low enough that both the ispClock5610 and ispClock5620 can operate all outputs at maximum frequency over their complete rated temperature range, as shown in Figure 23c. Note that because of variations in circuit board mounting, construction, and layout, as well as convective and forced airflow present in a given design, actual die operating temperature is subject to considerable variation from that which may be theoretically predicted from package characteristics and device power dissipation. Output Enable Controls The ispClock5600 family provides the user with several options for enabling and disabling output pins, as well as suspending the output clock. In addition to providing the user with the ability to reduce the device’s power con- 26 Lattice Semiconductor ispClock5600 Family Data Sheet sumption by turning off unused drivers, these features can also be used for functional testing purposes. The following inputs pins are used for output enable functions: • GOE – global output enable • OEX, OEY – secondary output enable controls • SGATE – synchronous output control Additionally, internal E2CMOS configuration bits are provided for the purpose of modifying the effects of these external control pins. When GOE is HIGH, all output drivers are forced into a high-Z state, regardless of any internal configuration. When GOE is LOW, the output drivers may also be enabled or disabled on an individual basis, and optionally controlled by the OEX and OEY pins. Internal E2CMOS configuration is used to establish whether the output driver is always enabled (when GOE pin is LOW), never enabled (permanently off), or selectively enabled by the state of either OEX or OEY. Bringing GOE high will also disable the internal feedback driver and will result in a loss of lock. Synchronous output gating is provided by ispClock5600 devices through the use of the SGATE pin. The SGATE pin does not disable the output driver, but merely forces the output to either a high or low state, depending on the output driver’s polarity setting. If the output driver polarity is true, the output will be forced LOW when SGATE is brought LOW, while if it is inverted, the output will be forced HIGH. A primary feature of the SGATE function is that the clock output is enabled and disabled synchronous to the selected internal clock source. This prevents the generation of partial, ‘runt’, output clock pulses, which would otherwise occur with simple combinatorial gating schemes. The SGATE is available to all clock outputs and is selectable on a bank-by-bank basis. Table 5 shows the behavior of the outputs for various combinations of the output enables, SGATE input, and E2CMOS configuration. Table 5. Clock Output Enable Functions GOE OEX OEY E2 Configuration Output X X X Always OFF High-Z 0 X X Always ON Clock Out 0 0 X Enable on OEX Clock Out 0 1 X Enable on OEX High-Z 0 X 0 Enable on OEY Clock Out 0 X 1 Enable on OEY High-Z 1 X X n/a High-Z Table 6. SGATE Function SGATE Bank Controlled by SGATE? Output Polarity Output NO True Clock X NO Inverted Inverted Clock 0 YES True LOW 0 YES Inverted HIGH 1 YES True Clock 1 YES Inverted Inverted Clock X Skew Control Units Each of the ispClock5600’s clock outputs is supported by a skew control unit which allows the user to insert an individually programmable delay into each output signal. This feature is useful when it is necessary to de-skew clock signals to compensate for physical length variations among different PCB clock paths. 27 Lattice Semiconductor ispClock5600 Family Data Sheet Unlike the skew adjustment features provided in many competing products, the ispClock5600’s skew adjustment feature provides exact and repeatable delays which exhibit extremely low channel-to-channel and device-to-device variation. This is achieved by deriving all skew timing from the VCO, which results in the skew increment being a linear function of the VCO period. For this reason, skews are defined in terms of ‘unit delays’, which may be programmed by the user over a range of 0 to 15. The ispClock5600 family also supports both ‘fine’ and ‘coarse’ skew modes. In fine skew mode, the unit skew ranges from 195ps to 390 ps, while in the coarse skew mode unit skew varies from 390ps to 780ps. The exact unit skew (TU) may be calculated from the VCO frequency (fvco) by using the following expressions: For fine skew mode, TU = For coarse skew mode, 1 8fvco TU = 1 4fvco (5) When an output driver is programmed to support a differential output mode, a single skew setting is applied to both the BANKxA+ and BANKxB- signals. When the output driver is configured to support a single-ended output standard, each of the two single-ended outputs may be assigned independent skews. By using the internal feedback path, and programming a skew into the feedback skew control, it is possible to implement negative timing skews, in which the clock edge of interest appears at the ispClock5600’s output before the corresponding edge is presented at the reference input. When the feedback skew unit is used in this way, the resulting negative skew is added to whatever skew is specified for each output. For example, if the feedback skew is set to 6TU, BANK1’s skew is 8TU and BANK2’s skew is 3TU, then BANK1’s effective output skew will be 2TU (8TU-6TU), while BANK2’s effective skew will be -3TU (3TU-6TU). This negative skew will manifest itself as BANK2’s outputs appearing to lead the input reference clock, appearing as a negative propagation delay. Please note that the skew control units are only usable when the PLL is selected. In PLL bypass mode (PLL_BYPASS=1), output skew settings will be ineffective and all outputs will exhibit skew consistent with the device’s propagation delay and the individual delays inherent in the output drivers consistent with the logic standard selected. Coarse Skew Mode The ispClock5600 family provides the user with the option of obtaining longer skew delays at the cost of reduced time resolution through the use of coarse skew mode. Coarse skew mode provides unit delays ranging from 390ps (fVCO = 640MHz) to 780ps (fVCO = 320MHz), which is twice as long as those provided in fine skew mode. When coarse skew mode is selected, an additional divide-by-2 stage is effectively inserted between the VCO and the Vdivider bank, as shown in Figure 24. When assigning divider settings in coarse skew mode, one must account for this additional divide-by-two so that the VCO still operates within its specified range (320-640MHz). Figure 24. Additional Factor-of-2 Division in Coarse Mode Fine Mode VCO V-dividers Fout Coarse Mode ÷2 When one moves from fine skew mode to coarse skew mode with a given divider configuration, the VCO frequency will attempt to double to compensate for the additional divide-by-2 stage. Because the fVCO range is not increased, however, one must modify the feedback path V-divider settings to bring fVCO back into its specified operating range (320MHz to 640MHz). This can be accomplished by dividing all V-divider settings by two. All output frequencies will remain unchanged from what they were in fine mode. One drawback of moving from fine skew mode into coarse skew mode is that it may not be possible to maintain consistent output frequencies, as only those V-divider settings 28 Lattice Semiconductor ispClock5600 Family Data Sheet which are multiples of four (in fine mode) may be divided by two. For example, a V-divider setting of 24 will divide down to 12, which is also a legal V-divider setting, whereas an initial setting of 26 would divide down to 13, which is not a valid setting. When one moves from coarse skew mode to fine skew mode, the extra divide-by-two factor is removed from between the VCO and the V-divider bank, halving the VCO’s effective operating frequency. To compensate for this change, all of the V-dividers must be doubled to move the VCO back into its specified operating range and maintain consistent output frequencies. The only situation in which this may be a problem is when a V-divider initially in coarse mode has a value greater than 32, as the corresponding fine skew mode setting would be greater than 64, which is not supported. Output Skew Matching and Accuracy Understanding the various factors which relate to output skew is essential for realizing optimal skew performance in the ispClock5600 family of devices. In the case where two outputs are identically configured, and driving identical loads, the maximum skew is defined by tSKEW, which is specified as a maximum of 50ps. In Figure 25 the Bank1A and BANK2A outputs show the skew error between two matched outputs. Figure 25. Skew Matching Error Sources 2ns +/- (tSKEW) +/- (tSKERR ) +/- t SKEW BANK1A (skew setting = 0) BANK2A (skew setting=0) BANK3A (skew setting = 2ns) One can also program a user-defined skew between two outputs using the skew control units. Because the programmable skew is derived from the VCO frequency, as described in the previous section, the absolute skew is very accurate. The typical error for any non-zero skew setting is given by the tSKERR specification. For example, if one is in fine skew mode with a VCO frequency of 500MHz, and selects a skew of 8TU, the realized skew will be 2ns, which will typically be accurate to within +/-30 ps. An example of error vs. skew setting can be found in the chart ‘Typical Skew Error vs. Setting’ in the typical performance characteristics section. Note that this parameter adds to output-to-output skew error only if the two outputs have different skew settings. The Bank1A and Bank3A outputs in Figure 25 show how the various sources of skew error stack up in this case. Note that if two or more outputs are programmed to the same skew setting, then the contribution of the tSKERR skew error term does not apply. When outputs are configured or loaded differently, this also has an effect on skew matching. If an output is set to support a different logic type, this can be accounted for by using the tIOO output adders specified in the Table ‘Switching Characteristics’. That table specifies the additional skew added to an output using LVPECL as a baseline. For instance, if one output is specified as LVTTL (tIOO = 0.15ns), and another output is specified as LVPECL (tIOO = 0ns), then one could expect 0.1ns of additional skew between the two outputs. This timing relationship is shown in Figure 26a. 29 Lattice Semiconductor ispClock5600 Family Data Sheet Figure 26. Output Timing Adders for Logic Type (a) and Output Slew Rate (b) 660ps 0.15ns LVPECL Output (TIOS = 0) LVCMOS Output (Slew rate=1) LVTTL Output (TIOS = 0.1ns) LVCMOS Output (Slew rate=3) (a) (b) Similarly, when one changes the slew rate of an output, the output slew rate adders (tIOS) can be used to predict the resulting skew. In this case, the fastest slew setting (1) is used as the baseline against which other slews are measured. For example, in the case of outputs configured to the same logic type (e.g. LVCMOS 1.8V), if one output is set to the fastest slew rate (1, tIOS = 0ps), and another set to slew rate 3 (tIOS = 660ps), then one could expect 660ps of skew between the two outputs, as shown in Figure 26b. Static Phase Offset and Input-Output Skew The ispClock5600’s external feedback inputs can be used to obtain near-zero effective delays from the clock reference input pins to a designated output pin. In external feedback mode (Figure 27) the PLL will attempt to force the output phase so that the rising edge phase (tφ) at the feedback input matches the rising edge phase at the reference input. The residual error between the two is specified as the static phase error. Note that any propagation delays (tFBK) in the external feedback path drive the phase of the output signal backwards in time as measured at the output. For this reason, if zero input-to-output delays are required in external feedback mode, the length of the signal path between the output pin and the feedback pin should be minimized. Figure 27. External Feedback Mode and Timing Relationships Input Reference Clock REF ispClock5600 BANK OUTPUT FBK Delay = t FBK tφ REF FBK BANK OUTPUT tFBK Other Features Internal Feedback Mode In addition to supporting the use of external feedback to close the phase-locked loop, ispClock5620 also provides the option of using an internal feedback path for this function. This feature is useful for minimizing external connections and routing in situations where one does not wish to attempt to compensate for external signal path delays. 30 Lattice Semiconductor ispClock5600 Family Data Sheet Profile Select The ispClock5600 stores all internal configuration data in on-board E2CMOS memory. Up to four independent configuration profiles may be stored in each device. The choice of which configuration profile is to be active is specified thought the profile select inputs PS0 and PS1, as shown in Table 7. Table 7. Profile Select Function PS1 PS0 Active Profile 0 0 Profile 0 0 1 Profile 1 1 0 Profile 2 1 1 Profile 3 Each profile controls the following internal configuration items: • • • • • • • M divider setting N divider setting V divider settings PLL loop filter settings Output skew settings Internal feedback skew settings Internal vs. external feedback selection The following settings are independent of the selection of active profile and will apply regardless of which profile is selected: • Input logic configuration – Logic family – Input impedance • Output bank logic configuration – Logic family – V-Divider signal source – Enable/SGATE control options – Output impedance – Slew rate – Signal inversion • V-Divider to be used as feedback source • Fine/Coarse skew mode selection • UES string If any of the above items are modified, the change will apply across all profiles. In some cases this may cause unanticipated behavior. If multiple profiles are used in a design, the suitability of the profile independent settings must be considered with respect to each of the individual profiles. When a profile is changed by modifying the values of the PS0 and PS1 inputs, it may be necessary to assert a RESET signal to the ispClock5600 to restart the PLL and resynchronize all the internal dividers. RESET and Power-up Functions To ensure proper PLL startup and synchronization of outputs, the ispClock5600 provides both internally generated and user-controllable external reset signals. An internal reset is generated whenever the device is powered up. An external reset may be applied by asserting a logic HIGH at the RESET pin. Please note that the RESET pin does not have an internal pull-up or pull-down resistor associated with it and should be tied LOW if not used. Asserting RESET resets all internal dividers, and will cause the PLL to lose lock. On losing lock, the VCO frequency will begin dropping. The length of time required to regain lock is related to the length of time for which RESET was asserted. 31 Lattice Semiconductor ispClock5600 Family Data Sheet When the ispClock5600 begins operating from initial power-on, the VCO starts running at a very low frequency (<100 MHz) which gradually increases as it approaches a locked condition. To prevent invalid outputs from being applied to the rest of the system, it is recommended that either the SGATE, OEX, or OEY pins be used to control the outputs based on the status of the LOCK pin. Holding the SGATE pin LOW during power-up will result in the BANK outputs being asserted HIGH or LOW (depending on inversion status) until SGATE is brought HIGH. Asserting OEX or OEY high will result in the BANK outputs being held in a high-impedance state until the OEX or OEY pin is pulled LOW. One should not use the GOE pin to control the outputs in anticipation of LOCK status, as holding GOE HIGH also disables internal feedback and will prevent the device from ever achieving lock. Software-Based Design Environment Designers can configure the ispClock5600 using Lattice’s PAC-Designer software, an easy to use, Microsoft Windows compatible program. Circuit designs are entered graphically and then verified, all within the PAC-Designer environment. Full device programming is supported using PC parallel port I/O operations and a download cable connected to the serial programming interface pins of the ispClock5600. A library of configurations is included with basic solutions and examples of advanced circuit techniques are available on the Lattice web site at www.latticesemi.com. In addition, comprehensive on-line and printed documentation is provided that covers all aspects of PAC-Designer operation. The PAC-Designer schematic window, shown in Figure 28 provides access to all configurable ispClock5600 elements via its graphical user interface. All analog input and output pins are represented. Static or non-configurable pins such as power, ground and the serial digital interface are omitted for clarity. Any element in the schematic window can be accessed via mouse operations as well as menu commands. When completed, configurations can be saved and downloaded to devices. Figure 28. PAC-Designer Design Entry Screen In-System Programming The ispClock5600 is an In-System Programmable (ISP™) device. This is accomplished by integrating all E2CMOS configuration control logic on-chip. Programming is performed through a 4-wire, IEEE 1149.1 compliant serial JTAG interface at normal logic levels. Once a device is programmed, all configuration information is stored on-chip, in non-volatile E2CMOS memory cells. The specifics of the IEEE 1149.1 serial interface and all ispClock5600 instructions are described in the JTAG interface section of this data sheet. 32 Lattice Semiconductor ispClock5600 Family Data Sheet User Electronic Signature A user electronic signature (UES) feature is included in the E2CMOS memory of the ispClock5600. This consists of 32 bits that can be configured by the user to store unique data such as ID codes, revision numbers or inventory control data. The specifics this feature are discussed in the IEEE 1149.1 serial interface section of this data sheet. Electronic Security An electronic security “fuse” (ESF) bit is provided in every ispClock5600 device to prevent unauthorized readout of the E2CMOS configuration bit patterns. Once programmed, this cell prevents further access to the functional user bits in the device. This cell can only be erased by reprogramming the device, so the original configuration can not be examined once programmed. Usage of this feature is optional. The specifics of this feature are discussed in the IEEE 1149.1 serial interface section of this data sheet. Production Programming Support Once a final configuration is determined, an ASCII format JEDEC file can be created using the PAC-Designer software. Devices can then be ordered through the usual supply channels with the user’s specific configuration already preloaded into the devices. By virtue of its standard interface, compatibility is maintained with existing production programming equipment, giving customers a wide degree of freedom and flexibility in production planning. Evaluation Fixture Included in the basic ispClock5600 Design Kit is an engineering prototype board that can be connected to the parallel port of a PC using a Lattice ispDOWNLOAD® cable. It demonstrates proper layout techniques for the ispClock5600 and can be used in real time to check circuit operation as part of the design process. Input and output connections (SMA connectors for all RF signals) are provided to aid in the evaluation of the ispClock5600 for a given application. (Figure 29). Part Number Description PAC-SYSTEMCLK5620 Complete system kit, evaluation board, ispDOWNLOAD cable and software. PACCLK5620-EV Evaluation board only, with components, fully assembled. Figure 29. Download from a PC PAC-Designer Software Other System Circuitry ispDownload Cable (6') 4 33 ispClock5600 Device Lattice Semiconductor ispClock5600 Family Data Sheet IEEE Standard 1149.1 Interface (JTAG) Serial Port Programming Interface Communication with the ispClock5600 is facilitated via an IEEE 1149.1 test access port (TAP). It is used by the ispClock5600 both as a serial programming interface, and for boundary scan test purposes. A brief description of the ispClock5600 JTAG interface follows. For complete details of the reference specification, refer to the publication, Standard Test Access Port and Boundary-Scan Architecture, IEEE Std. 1149.1-1990 (which now includes IEEE Std. 1149.1a-1993). Overview An IEEE 1149.1 test access port (TAP) provides the control interface for serially accessing the digital I/O of the ispClock5600. The TAP controller is a state machine driven with mode and clock inputs. Given in the correct sequence, instructions are shifted into an instruction register which then determines subsequent data input, data output, and related operations. Device programming is performed by addressing the configuration register, shifting data in, and then executing a program configuration instruction, after which the data is transferred to internal E2CMOS cells. It is these non-volatile cells that store the configuration or the ispClock5600. A set of instructions are defined that access all data registers and perform other internal control operations. For compatibility between compliant devices, two data registers are mandated by the IEEE 1149.1 specification. Others are functionally specified, but inclusion is strictly optional. Finally, there are provisions for optional data registers defined by the manufacturer. The two required registers are the bypass and boundary-scan registers. Figure 30 shows how the instruction and various data registers are organized in an ispClock5600. Figure 30. ispClock5600 TAP Registers DATA REGISTER (90 BITS) E2CMOS NON-VOLATILE MEMORY ADDRESS REGISTER (10 BITS) MULTIPLEXER UES REGISTER (32 BITS) IDCODE REGISTER (32 BITS) B-SCAN REGISTER (56 BITS) BYPASS REGISTER (1 BIT) INSTRUCTION REGISTER (8 BITS) TEST ACCESS PORT (TAP) LOGIC TDI TCK TMS OUTPUT LATCH TDO TAP Controller Specifics The TAP is controlled by the Test Clock (TCK) and Test Mode Select (TMS) inputs. These inputs determine whether an Instruction Register or Data Register operation is performed. Driven by the TCK input, the TAP consists of a small 16-state controller design. In a given state, the controller responds according to the level on the TMS input as shown in Figure 31. Test Data In (TDI) and TMS are latched on the rising edge of TCK, with Test Data Out (TDO) becoming valid on the falling edge of TCK. There are six steady states within the controller: Test-Logic-Reset, Run34 Lattice Semiconductor ispClock5600 Family Data Sheet Test/Idle, Shift-Data-Register, Pause-Data-Register, Shift-Instruction-Register and Pause-Instruction-Register. But there is only one steady state for the condition when TMS is set high: the Test-Logic-Reset state. This allows a reset of the test logic within five TCKs or less by keeping the TMS input high. Test-Logic-Reset is the power-on default state. Figure 31. TAP States 1 Test-Logic-Rst 0 0 Run-Test/Idle 1 Select-DR-Scan 1 1 0 Capture-DR Select-IR-Scan 1 0 Capture-IR 0 0 0 Shift-DR 1 1 1 Exit1-IR 0 0 Pause-DR 1 1 Exit2-IR 1 Update-DR 0 0 Pause-IR 0 0 Exit2-DR 1 0 Shift-IR 1 Exit1-DR 0 1 1 Update-IR 1 0 Note: The value shown adjacent to each state transition in this figure represents the signal present at TMS at the time of a rising edge at TCK. When the correct logic sequence is applied to the TMS and TCK inputs, the TAP will exit the Test-Logic-Reset state and move to the desired state. The next state after Test-Logic-Reset is Run-Test/Idle. Until a data or instruction shift is performed, no action will occur in Run-Test/Idle (steady state = idle). After Run-Test/Idle, either a data or instruction shift is performed. The states of the Data and Instruction Register blocks are identical to each other differing only in their entry points. When either block is entered, the first action is a capture operation. For the Data Registers, the Capture-DR state is very simple: it captures (parallel loads) data onto the selected serial data path (previously chosen with the appropriate instruction). For the Instruction Register, the Capture-IR state will always load the IDCODE instruction. It will always enable the ID Register for readout if no other instruction is loaded prior to a Shift-DR operation. This, in conjunction with mandated bit codes, allows a “blind” interrogation of any device in a compliant IEEE 1149.1 serial chain. From the Capture state, the TAP transitions to either the Shift or Exit1 state. Normally the Shift state follows the Capture state so that test data or status information can be shifted out or new data shifted in. Following the Shift state, the TAP either returns to the Run-Test/Idle state via the Exit1 and Update states or enters the Pause state via Exit1. The Pause state is used to temporarily suspend the shifting of data through either the Data or Instruction Register while an external operation is performed. From the Pause state, shifting can resume by reentering the Shift state via the Exit2 state or be terminated by entering the Run-Test/Idle state via the Exit2 and Update states. If the proper instruction is shifted in during a Shift-IR operation, the next entry into Run-Test/Idle initiates the test mode (steady state = test). This is when the device is actually programmed, erased or verified. All other instructions are executed in the Update state. Test Instructions Like data registers, the IEEE 1149.1 standard also mandates the inclusion of certain instructions. It outlines the function of three required and six optional instructions. Any additional instructions are left exclusively for the manu- 35 Lattice Semiconductor ispClock5600 Family Data Sheet facturer to determine. The instruction word length is not mandated other than to be a minimum of two bits, with only the BYPASS and EXTEST instruction code patterns being specifically called out (all ones and all zeroes respectively). The ispClock5000 contains the required minimum instruction set as well as one from the optional instruction set. In addition, there are several proprietary instructions that allow the device to be configured and verified. For ispClock5000, the instruction word length is eight bits. All ispClock5000 instructions available to users are shown in Table 8. The following table lists the instructions supported by the ispClock5600 JTAG Test Access Port (TAP) controller: Table 8. ispClock5600 TAP Instruction Table Instruction Code Description EXTEST 0000 0000 External Test. ADDRESS_SHIFT 0000 0001 Address register (10 bits) DATA_SHIFT 0000 0010 Address column data register (89 bits) BULK_ERASE 0000 0011 Bulk Erase PROGRAM 0000 0111 Program column data register to E2 PROGRAM_SECURITY 0000 1001 Program Electronic Security Fuse VERIFY 0000 1010 Verify column DISCHARGE 0001 0100 Fast VPP Discharge PROGRAM_ENABLE 0001 0101 Enable Program Mode IDCODE 0001 0110 Address Manufacturer ID code register (32 bits) USERCODE 0001 0111 Read UES data from E2 and addresses UES register (32 bits) PROGRAM_USERCODE 0001 1010 Program UES register into E2 PROGRAM_DISABLE 0001 1110 Disable Program Mode HIGHZ 0001 1000 Force all outputs to High-Z state SAMPLE/PRELOAD 0001 1100 Capture current state of pins to boundary scan register CLAMP 0010 0000 Drive I/Os with boundary scan register USER_LOGIC_RESET 0010 0010 Resets User Logic INTEST 0010 1100 Performs in-circuit functional testing of device. ERASE DONE 0010 0100 Erases the ‘Done’ bit only PROG_INCR 0010 0111 Program column data register to E2 and auto-increment address register VERIFY_INCR 0010 1010 Load column data register from E2 and auto-increment address register PROGRAM_DONE 0010 1111 Programs the ‘Done’ Bit NOOP 0011 0000 Functions Similarly to CLAMP instruction BYPASS 1xxx xxxx Bypass - Connect TDO to TDI BYPASS is one of the three required instructions. It selects the Bypass Register to be connected between TDI and TDO and allows serial data to be transferred through the device without affecting the operation of the ispClock5600. The IEEE 1149.1 standard defines the bit code of this instruction to be all ones (111111). The required SAMPLE/PRELOAD instruction dictates the Boundary-Scan Register be connected between TDI and TDO. The bit code for this instruction is defined by Lattice as shown in Table 8. The EXTEST (external test) instruction is required and will place the device into an external boundary test mode while also enabling the boundary scan register to be connected between TDI and TDO. The bit code of this instruction is defined by the 1149.1 standard to be all zeros (000000). The optional IDCODE (identification code) instruction is incorporated in the ispClock5600 and leaves it in its functional mode when executed. It selects the Device Identification Register to be connected between TDI and TDO. The Identification Register is a 32-bit shift register containing information regarding the IC manufacturer, device type and version code (Figure 32). Access to the Identification Register is immediately available, via a TAP data 36 Lattice Semiconductor ispClock5600 Family Data Sheet scan operation, after power-up of the device, or by issuing a Test-Logic-Reset instruction. The bit code for this instruction is defined by Lattice as shown in Table 8. Figure 32. ispClock5600 Family ID Codes MSB LSB XXXX / 0000 0001 0110 0001 / 0000 0100 001 / 1 Version (4 bits) E2 Configured Part Number (16 bits) 0161h = ispClock5610 (3.3V version) Constant ‘1’ (1 bit) per 1149.1-1990 JEDEC Manufacturer Identity Code for Lattice Semiconductor (11 bits) MSB LSB XXXX / 0000 0001 0110 0000 / 0000 0100 001 / 1 Version (4 bits) E Configured 2 Part Number (16 bits) 0160h = ispClock5620 (3.3V version) JEDEC Manufacturer Identity Code for Lattice Semiconductor (11 bits) Constant ‘1’ (1 bit) per 1149.1-1990 In addition to the four instructions described above, there are 20 unique instructions specified by Lattice for the ispClock5620. These instructions are primarily used to interface to the various user registers and the E2CMOS nonvolatile memory. Additional instructions are used to control or monitor other features of the device, including boundary scan operations. A brief description of each unique instruction is provided in detail below, and the bit codes are found in Table 8. PROGRAM_ENABLE – This instruction enables the ispClock5600’s programming mode. PROGRAM_DISABLE – This instruction disables the ispClock5600’s programming mode. BULK_ERASE – This instruction will erase all E2CMOS bits in the device, including the UES data and electronic security fuse (ESF). A bulk erase instruction must be issued before reprogramming a device. The device must already be in programming mode for this instruction to execute. ADDRESS_SHIFT – This instruction shifts address data into the address register (10 bits) in preparation for either a PROGRAM or VERIFY instruction. DATA_SHIFT – This instruction shifts data into or out of the data register (90 bits), and is used with both the PROGRAM and VERIFY instructions. PROGRAM – This instruction programs the contents of the data register to the E2CMOS memory column pointed to by the address register. The device must already be in programming mode for this instruction to execute. PROG_INCR – This instruction first programs the contents of the data register into E2CMOS memory column pointed to by the address register and then auto-increments the value of the address register. The device must already be in programming mode for this instruction to execute. PROGRAM_SECURITY – This instruction programs the electronic security fuse (ESF). This prevents data other than the ID code and UES strings from being read from the device. The electronic security fuse may only be reset by issuing a BULK_ERASE command. The device must already be in programming mode for this instruction to execute. 37 Lattice Semiconductor ispClock5600 Family Data Sheet VERIFY – This instruction loads data from the E2CMOS array into the column register. The data may then be shifted out. The device must already be in programming mode for this instruction to execute. VERIFY_INCR – This instruction copies the E2CMOS column pointed to by the address register into the data column register and then auto-increments the value of the address register. The device must already be in programming mode for this instruction to execute. DISCHARGE – This instruction is used to discharge the internal programming supply voltage after an erase or programming cycle and prepares ispClock5600 for a read cycle. PROGRAM_USERCODE – This instruction writes the contents of the UES register (32 bits) into E2CMOS memory. The device must already be in programming mode for this instruction to execute. USERCODE – This instruction both reads the UES string (32 bits) from E2CMOS memory into the UES register and addresses the UES register so that this data may be shifted in and out. HIGHZ – This instruction forces all outputs into a High-Z state. CLAMP – This instruction drives I/O pins with the contents of the boundary scan register. USER_LOGIC_RESET – This instruction resets all user-accessible logic, similar to asserting a HIGH on the RESET pin. INTEST – This instruction performs in-circuit functional testing of the device. ERASE_DONE – This instruction erases the ‘DONE’ bit only. This instruction is used to disable normal operation of the device while in programming mode until a valid configuration pattern has been programmed. PROGRAM_DONE – This instruction programs the ‘DONE’ bit only. This instruction is used to enable normal device operation after programming is complete. NOOP – This instruction behaves similarly to the CLAMP instruction. 38 Lattice Semiconductor ispClock5600 Family Data Sheet Pin Descriptions Pin Number Pin Name Description Pin Type ispClock5610 48 TQFP ispClock5620 100 TQFP VCCO_0 Output Driver ‘0’ VCC Power 1 3 VCCO_1 Output Driver ‘1’ VCC Power 5 7 VCCO_2 Output Driver ‘2’ VCC Power 9 11 VCCO_3 Output Driver ‘3’ VCC Power 25 15 VCCO_4 Output Driver ‘4’ VCC Power 29 19 VCCO_5 Output Driver ‘5’ VCC Power — 51 VCCO_6 Output Driver ‘6’ VCC Power — 55 VCCO_7 Output Driver ‘7’ VCC Power — 59 VCCO_8 Output Driver ‘8’ VCC Power — 63 VCCO_9 Output Driver ‘9’ VCC Power — 67 GNDO_0 Output Driver ‘0’ Ground GND 4 6 GNDO_1 Output Driver ‘1’ Ground GND 8 10 GNDO_2 Output Driver ‘2’ Ground GND 12 14 GNDO_3 Output Driver ‘3’ Ground GND 28 18 GNDO_4 Output Driver ‘4’ Ground GND 32 22 GNDO_5 Output Driver ‘5’ Ground GND — 54 GNDO_6 Output Driver ‘6’ Ground GND — 58 GNDO_7 Output Driver ‘7’ Ground GND — 62 GNDO_8 Output Driver ‘8’ Ground GND — 66 GNDO_9 Output Driver ‘9’ Ground GND — 70 BANK_0A Clock Output driver 0, ‘A’ output Output 3 5 BANK_0B Clock Output driver 0, ‘B’ output Output 2 4 BANK_1A Clock Output driver 1, ‘A’ output Output 7 9 BANK_1B Clock Output driver 1, ‘B’ output Output 6 8 BANK_2A Clock Output driver 2, ‘A’ output Output 11 13 BANK_2B Clock Output driver 2, ‘B’ output Output 10 12 BANK_3A Clock Output driver 3, ‘A’ output Output 27 17 BANK_3B Clock Output driver 3, ‘B’ output Output 26 16 BANK_4A Clock Output driver 4, ‘A’ output Output 31 21 BANK_4B Clock Output driver 4, ‘B’ output Output 30 20 BANK_5A Clock Output driver 5, ‘A’ output Output — 53 BANK_5B Clock Output driver 5, ‘B’ output Output — 52 BANK_6A Clock Output driver 6, ‘A’ output Output — 57 BANK_6B Clock Output driver 6, ‘B’ output Output — 56 BANK_7A Clock Output driver 7, ‘A’ output Output — 61 BANK_7B Clock Output driver 7, ‘B’ output Output — 60 BANK_8A Clock Output driver 8, ‘A’ output Output — 65 BANK_8B Clock Output driver 8, ‘B’ output Output — 64 BANK_9A Clock Output driver 9, ‘A’ output Output — 69 BANK_9B Clock Output driver 9, ‘B’ output Output — 68 VCCA Analog VCC for PLL circuitry Power 13 30 GNDA Analog Ground for PLL circuitry GND 14 31 39 Lattice Semiconductor ispClock5600 Family Data Sheet Pin Descriptions (Continued) Pin Number Pin Name Description Pin Type ispClock5610 48 TQFP ispClock5620 100 TQFP Power 24, 33 47, 71 VCCD Digital Core VCC GNDD Digital GND GND 23, 48 46, 93 VCCJ JTAG interface VCC Power 36 74 REFA+ Clock Reference A positive input Input 18 38 REFA- Clock Reference A negative input Input 19 39 REFB+ Clock Reference B positive input Input — 42 REFB- Clock Reference B negative input Input — 41 REFSEL Clock Reference Select input (LVCMOS) Input1 — 43 REFVTT Termination voltage for reference inputs Power 20 40 FBKA+ Clock feedback A positive input Input 15 32 FBKA- Clock feedback A negative input Input 16 33 FBKB+ Clock feedback B positive input Input — 36 FBKB- Clock feedback B negative input Input — 35 FBKSEL Clock feedback select input (LVCMOS) Input1 — 37 FBKVTT Termination voltage for feedback inputs Power 17 34 TDO JTAG TDO Output line Output 35 73 TDI JTAG TDI Input line Input2 39 84 TCK JTAG Clock Input Input 38 83 TMS JTAG Mode Select Input2 37 82 LOCK PLL Lock indicator, LOW indicates PLL lock Output 34 72 SGATE Synchronous output gate Input1 40 85 1 GOE Global Output Enable Input 42 87 OEX Output Enable 1 Input 21 44 OEY Output Enable 2 Input 22 45 PS0 Profile Select 0 Input1 44 89 Profile Select 1 1 43 88 Input1 47 92 1 PS1 Input PLL_BYPASS PLL Bypass RESET Reset PLL Input 41 86 TEST1 Test Input 1 - connect to GNDD Input 46 91 TEST2 Test Input 2 - connect to GNDD Input 45 90 n/c No internal connection n/a — 1, 2, 23, 24, 25, 26, 27, 28, 29, 48, 49, 50, 75, 76, 77, 78, 79, 94, 97, 98, 99, 100 Reserved Factory use only - Do not connect n/a — 80, 81, 95, 96 1. Internal pull-down resistor. 2. Internal pull-up resistor. 40 Lattice Semiconductor ispClock5600 Family Data Sheet Detailed Pin Descriptions VCCO_[0..9], GNDO_[0..9] – These pins provide power and ground for each of the output banks. In the case when an output bank is unused, its corresponding VCCO pin may be left unconnected or preferably should be tied to ground. ALL GNDO pins should be tied to ground regardless of whether the associated bank is used or not. When a bank is used, it should be individually bypassed with a capacitor in the range of 0.01 to 0.1uF as close to its VCCO and GNDO pins as is practical. BANK_[0..9]A, BANK_[0..9]B – These pins provide clock output signals. The choice of output divider (V0-V4) and output driver type (CMOS, LVDS, SSTL, etc.) may be selected on a bank-by-bank basis. When the outputs are configured as pairs of single-ended outputs, output impedance and slew rate may be selected on an output-by-output basis. VCCA, GNDA – These pins provide analog supply and ground for the ispClock5600 family’s internal analog circuitry, and should be bypassed with a 0.1uF capacitor as close to the pins as is practical. To improve noise immunity, it is suggested that the supply to the VCCA pin be isolated from other circuitry with a ferrite bead. VCCD, GNDD – These pins provide digital supply and ground for the ispClock5600 family’s internal digital circuitry, and should be bypassed with a 0.1uF capacitor as close to the pins as is practical. to improve noise immunity it is suggested that the supply to the VCCD pins be isolated with ferrite beads. VCCJ – This pin provides power and a reference voltage for use by the JTAG interface circuitry. It may be set to allow the ispClock5600 family devices to function in JTAG chains operating at voltages differing from VCCD. REFA+, REFA-, REFB+, REFB- – These input pins provide the inputs for clock signals, and can accommodate either single ended or differential signal protocols by using either just the ‘+’ pins, or both the ‘+’ and ‘-‘ pins. Two sets of inputs are provided to accommodate the use of different signal sources and redundant clock sources. REFSEL – This input pin is used to select which clock input pair (REFA+/- or REB+/-) is selected for use as the reference input. When REFSEL=0, REFA+/- is used, and when REFSEL=1, REFB+/- is used. REFVTT – This pin is used to provide a termination voltage for the reference inputs when they are configured for SSTL or HSTL logic, and should be connected to a suitable voltage supply in those cases. FBKA+, FBKA-, FBKB+, FBKB- – These input pins provide the inputs for feedback sense of output clock signals, and can accommodate either single ended or differential signal protocols by using either just the ‘+’ pins, or both the ‘+’ and ‘-‘ pins. Two sets of inputs are provided to accommodate the use of alternate feedback signal sources. FBKSEL – This input pin is used to select which clock input pair (FBKA+/- or FBK+/-) is selected for use as the feedback input. When FBKSEL=0, FBKA+/- is used, and when FBKSEL=1, FBKB+/- is used. FBKVTT – This pin is used to provide a termination voltage for the feedback inputs when they are configured for SSTL or HSTL logic, and should be connected to a suitable voltage supply in those cases. TDO, TDI, TCK, TMS – These pins comprise the ispClock5600 device’s JTAG interface. The signal levels for these pins are determined by the selection of the VCCJ voltage. LOCK – This output pin indicates that the device’s PLL is in a locked condition when it goes low. SGATE – This input pin provides a synchronous gating function for the outputs, which may be enabled on a bankby-bank basis. When the synchronous gating function is enabled for a given bank, that bank’s outputs will output a clock signal when the SGATE pin is HIGH, and will drive a constant HIGH or LOW when the SGATE pin is LOW. Synchronous gating ensures that when the state of SGATE is changed, no partial clock pulses will appear at the outputs. OEX, OEY – These pins are used to enable the outputs or put them into a high-impedance condition. Each output may be set so that it is always on, always off, enabled by OEX or enabled by OEY. 41 Lattice Semiconductor ispClock5600 Family Data Sheet GOE – Global output enable. This pin drives all outputs to a high-impedance state when it is pulled HIGH. GOE also controls the internal feedback buffer, so that bringing GOE high will cause the PLL to lose lock. PS0, PS1 – These input pins are used to select one of four user-defined configuration profiles for the device. PLL_BYPASS – When this pin is pulled LOW, the V-dividers are driven from the output of the device’s VCO, and the device behaves as a phase-locked loop. When this pin is pulled HIGH, the V-dividers are driven directly from the output of the M-divider, and the PLL functions are effectively bypassed. RESET – When this pin is pulled HIGH, all on-board counters are reset, and lock is lost. TEST1,TEST2 – These pins are used for factory test functions, and should always be tied to ground. n/c – These pins have no internal connection. We recommend that they be left unconnected. RESERVED – These pins are reserved for factory use and should be left unconnected. 42 Lattice Semiconductor ispClock5600 Family Data Sheet Package Diagrams 48-Pin TQFP (Dimensions in Millimeters) PIN 1 INDICATOR 0.20 H A-B D 0.20 C A-B D D1 D N 3. A 1 E1 E B e D 8. 4X 3. 3. SEE DETAIL "A" H b 0.08 C A SEATING PLANE GAUGE PLANE 0.25 A2 B M C A -B D 0.08 C LEAD FINISH A1 B 0.20 MIN. 0-7∞ b L 1.00 REF. c c1 b DETAIL "A" 1 BASE METAL SECTION B - B SYMBOL 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5 - 1982. 2. ALL DIMENSIONS ARE IN MILLIMETERS. 3. DATUMS A, B AND D TO BE DETERMINED AT DATUM PLANE H. 4. DIMENSIONS D1 AND E1 DO NOT INCLUDE MOLD PROTRUSION. ALLOWABLE MOLD PROTRUSION IS 0.254 MM ON D1 AND E1 DIMENSIONS. 6. SECTION B-B: THESE DIMENSIONS APPLY TO THE FLAT SECTION OF THE LEAD BETWEEN 0.10 AND 0.25 MM FROM THE LEAD TIP. 7. A1 IS DEFINED AS THE DISTANCE FROM THE SEATING PLANE TO THE LOWEST POINT ON THE PACKAGE BODY. 8. EXACT SHAPE OF EACH CORNER IS OPTIONAL. 43 MAX. - - 1.60 0.05 - 0.15 A2 1.35 1.40 1.45 D 9.00 BSC D1 7.00 BSC E 9.00 BSC E1 7.00 BSC L 5. THE TOP OF PACKAGE MAY BE SMALLER THAN THE BOTTOM OF THE PACKAGE BY 0.15 MM. NOM. A1 A NOTES: MIN. 0.45 0.60 N 48 e 0.50 BSC 0.22 0.75 b 0.17 b1 0.17 0.20 0.27 0.23 c 0.09 0.15 0.20 c1 0.09 0.13 0.16 Lattice Semiconductor ispClock5600 Family Data Sheet 100-Pin TQFP (Dimensions in Millimeters) 0.20 C A-B PIN 1 INDICATOR D 100X D 3 A E E1 B 3 e D 8 D1 3 TOP VIEW 4X 0.20 H A-B D BOTTOM VIEW SIDE VIEW SEE DETAIL 'A' b 0.20 M C A-B SEATING PLANE C D GAUGE PLANE H A A2 0.25 B LEAD FINISH b 0.10 C c1 c b 0.20 MIN. A1 B 0-7∞ L 1.00 REF. DETAIL 'A' 1 BASE METAL SECTION B-B SYMBOL NOTES: MIN. NOM. MAX. A - - 1.60 A1 0.05 - 0.15 1.35 1.40 1.45 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5 - 1982. A2 2. ALL DIMENSIONS ARE IN MILLIMETERS. D 3. DATUMS A, B AND D TO BE DETERMINED AT DATUM PLANE H. D1 14.00 BSC 4. DIMENSIONS D1 AND E1 DO NOT INCLUDE MOLD PROTRUSION. ALLOWABLE MOLD PROTRUSION IS 0.254 MM ON D1 AND E1 DIMENSIONS. E 16.00 BSC 16.00 BSC 14.00 BSC E1 5. THE TOP OF PACKAGE MAY BE SMALLER THAN THE BOTTOM OF THE PACKAGE BY 0.15 MM. L N 100 6. SECTION B-B: THESE DIMENSIONS APPLY TO THE FLAT SECTION OF THE LEAD BETWEEN 0.10 AND 0.25 MM FROM THE LEAD TIP. e 0.50 BSC b 0.17 0.22 0.27 7. A1 IS DEFINED AS THE DISTANCE FROM THE SEATING PLANE TO THE LOWEST POINT ON THE PACKAGE BODY. b1 0.17 0.20 0.23 c 0.09 0.15 0.20 8. EXACT SHAPE OF EACH CORNER IS OPTIONAL. c1 0.09 0.13 0.16 44 0.45 0.60 0.75 Lattice Semiconductor ispClock5600 Family Data Sheet Part Number Description ispPAC-CLK56XX X - 01 XXXX X Device Family Grade I = Industrial Temp. Range C = Commercial Temp. Range Device Number CLK5610 CLK5620 Package T48 = 48-pin TQFP T100 = 100-pin TQFP TN48 = Lead-Free 48-pin TQFP TN100 = Lead-Free100-pin TQFP Performance Grade 01 = Standard Operating Voltage V = 3.3V Ordering Information Conventional Packaging Commercial Clock Outputs Supply Voltage Package Pins ispPAC-CLK5610V-01T48C Part Number 10 3.3V TQFP 48 ispPAC-CLK5620V-01T100C 20 3.3V TQFP 100 Industrial Clock Outputs Supply Voltage Package Pins ispPAC-CLK5610V-01T48I Part Number 10 3.3V TQFP 48 ispPAC-CLK5620V-01T100I 20 3.3V TQFP 100 Lead-Free Packaging Commercial Clock Outputs Supply Voltage Package Pins ispPAC-CLK5610V-01TN48C Part Number 10 3.3V Lead-Free TQFP 48 ispPAC-CLK5620V-01TN100C 20 3.3V Lead-Free TQFP 100 Package Pins Industrial Part Number Clock Outputs Supply Voltage ispPAC-CLK5610V-01TN48I 10 3.3V Lead-Free TQFP 48 ispPAC-CLK5620V-01TN100I 20 3.3V Lead-Free TQFP 100 45 Lattice Semiconductor ispClock5600 Family Data Sheet Package Options GNDD PLL_BYPASS TEST1 TEST2 PS0 PS1 GOE RESET SGATE TDI TCK TMS 48 47 46 45 44 43 42 41 40 39 38 37 ispClock5610: 48-pin TQFP VCCO_0 BANK_0B BANK_0A 1 2 3 36 35 34 VCCJ TDO LOCK GNDO_0 VCCO_1 BANK_1B 4 5 6 33 32 31 VCCD GNDO_4 BANK_4A BANK_1A GNDO_1 VCCO_2 7 8 9 30 29 28 BANK_4B VCCO_4 GNDO_3 BANK_2B BANK_2A GNDO_2 10 11 12 27 26 25 BANK_3A BANK_3B VCCO_3 13 14 15 16 17 18 19 20 21 22 23 24 VCCA GNDA FBKA+ FBKA- FBKVTT REFA+ REFA- REFVTT OEX OEY GNDD VCCD ispPACCLK5610V-01T48C 46 Lattice Semiconductor ispClock5600 Family Data Sheet n/c n/c n/c n/c Reserved Reserved n/c GNDD PLL_BYPASS TEST1 TEST2 PS0 PS1 GOE RESET SGATE TDI TCK TMS Reserved Reserved n/c n/c n/c n/c 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76 n/c VCCJ 3 4 5 73 72 71 TDO LOCK VCCD GNDO_0 VCCO_1 BANK_1B 6 7 8 70 69 68 GNDO_9 BANK_9A BANK_9B BANK_1A GNDO_1 VCCO_2 BANK_2B BANK_2A GNDO_2 9 10 11 12 13 14 67 66 65 64 63 62 VCCO_9 GNDO_8 BANK_8A BANK_8B VCCO_8 GNDO_7 VCCO_3 BANK_3B BANK_3A 15 16 17 61 60 59 BANK_7A BANK_7B VCCO_7 GNDO_3 VCCO_4 BANK_4B 18 19 20 58 57 56 GNDO_6 BANK_6A BANK_6B BANK_4A GNDO_4 n/c n/c 21 22 23 24 55 54 53 52 VCCO_6 GNDO_5 BANK_5A BANK_5B n/c 25 51 VCCO_5 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 VCCA GNDA FBKA+ FBKAFBKVTT FBKBFBKB+ FBSEL REFA+ REFA- REFVTT REFBREFB+ RFSEL OEX OEY GNDD VCCD n/c n/c n/c ispPAC-CLK5620V-01T100C 26 VCCO_0 BANK_0B BANK_0A 99 98 97 75 74 n/c n/c n/c 1 2 n/c n/c n/c 100 ispClock5620: 100-pin TQFP 47