M66014FP 16-bit Serial Bus Controller REJ03F0265-0200 Rev.2.00 Mar 18, 2008 Description M66014 semiconductor integrated circuit is a serial bus controller. It converts 2-byte parallel data that arrives from microcomputer into serial and outputs it to serial bus. It also converts serial data input from serial bus into parallel and outputs it to microcomputer. The M66014 is used for the extension of microcomputer I/O ports and two-way communication with peripheral equipment connected with serial buses. Features • • • • • • • Compatible with general-purpose 8-bit microprocessor busses TTL level input (one microcomputer side) Interrupt output Schmitt input (RESET, CS, SIN) Pin arrangement is fully compatible with M66011FP Low power dissipation Wide operating temperature range (Ta = –20 to 75°C) Application Microcomputer I/O port extension, etc. Block Diagram A1 A0 21 22 Shift clock output Reset input RESET 1 Chip select input CS 3 20 SCLK Xin Clock input 15 Oscillation circuit Clock output 16 INT Interrupt output Timing control circuit Write input WR 2 Read input RD 23 17 OE Output enable output CLK, LOAD Shift register for lower byte serial output (8 bits) CLK, LOAD Shift register for upper byte serial output (8 bits) SRL SRU 19 SOUT Serial data output 14 Xout Data bus D0 D1 D2 D3 D4 D5 D6 D7 4 5 6 CLK Shift register for serial input (16-bit) 8 7 8 9 10 8 8 11 ×8 REJ03F0265-0200 Rev.2.00 Mar 18, 2008 Page 1 of 4 Read register 8 18 SIN Serial data input M66014FP Pin Arrangement M66014FP Reset input RESET Write input WR Chip select CS input D0 1 24 VCC 2 23 3 22 4 21 RD A0 A1 D1 D2 D3 D4 D5 D6 5 20 6 19 7 18 8 17 9 16 10 15 11 14 12 13 Data bus D7 GND (Top view) Outline: 24P2N-B REJ03F0265-0200 Rev.2.00 Mar 18, 2008 Page 2 of 4 Read input Address input SCLK Shift clock output SOUT Serial data output SIN Serial data input Output enable output OE INT Interrupt output Clock input Xin Xout VCC Clock output M66014FP Serial Data Input/Output Operation A cycle of 16-bit serial output data setting and serial data communication starts with a write access given by microcomputer to transmission shift registers in M66014. M66014 has two 8-bit shift registers, on for upper byte (SRU), the other for lower byte (SRL). If the CS status rises from "L" to "H" after a write access is given to SRL, serial data communication is started. SRU 8-bit data and SRL 8-bit data are output in series in this order. Output of each data starts from its most significant bit. At the CS rise edge, busy flag in M66014 is set, and OE output shifts from "H" to "L". Shift clock SCLK and serial data SOUT are then output. At SCLK fall edges, serial output shift register executes shifting operation, and data on shift register is output in series from pin SOUT. Serial input data from pin SIN is taken into input shift register at SCLK rise edges. After the SCLK 16T rise edge, the status of SOUT and OE shifts to "H" after one bit's delay of SCLK, and busy flag is reset. When interrupt output is being set to enable, INT output is set. Remarks (1) If CS rises after write operation is executed on SRL only and not on SRU, SRU data is unstable. (2) When write operations executed on SRL, M66014 becomes ready for start of serial communication and stands by for detection of CS rise. However, if a read access is given after data is written on SRL while CS is maintained on "L" level, this standby status is canceled. To resume serial communication in this case, rewrite data on SRL and raise CS. SRL write operation Serial communication period CS Busy flag (in M66014) OE INT SCLK 1T SOUT 2T 8T 16T DO15 DO14 DO13 DO12 DO11 DO10 DO9 DO8 DO7 DO6 DO5 DO4 DO3 DO2 DO1 DO0 (D7U) SIN 9T (D0U) (D7L) DI15 DI14 DI13 DI12 DI11 DI10 DI9 DI8 DI7 (D0L) DI6 DI5 DI4 Figure 1 Serial Communication Timing Chart REJ03F0265-0200 Rev.2.00 Mar 18, 2008 Page 3 of 4 DI3 DI2 DI1 DI0 M66014FP Package Dimensions 24P2N-B Plastic 24pin 300mil SOP EIAJ Package Code SOP24-P-300-1.27 JEDEC Code — Weight(g) Lead Material Cu Alloy 24 e b2 E HE e1 I2 13 Recommended Mount Pad Symbol F 12 1 A D G A2 e b x M L L1 y A1 A A1 A2 b c D E e HE L L1 z Z1 x y c z Z1 Detail G REJ03F0265-0200 Rev.2.00 Mar 18, 2008 Page 4 of 4 Detail F b2 e1 I2 Dimension in Millimeters Min Nom Max 2.1 — — 0.2 0 0.1 1.8 — — 0.35 0.5 0.4 0.25 0.2 0.18 15.12 15.02 14.92 5.4 5.3 5.2 1.27 — — 8.42 8.12 7.82 0.7 0.5 0.3 1.41 — — — — 0.525 — — 0.675 — — 0.25 0.1 — — 0° 10° — 0.76 — — 7.62 — — 1.27 — — Sales Strategic Planning Div. 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