PIC16F87XA Datasheet, PDF (189/234 Pages) Microchip Technology – 28/40/44-Pin Enhanced Flash Microcontrollers

PIC16F87XA
FIGURE 17-10: PARALLEL SLAVE PORT TIMING (PIC16F874A/877A ONLY)
RE2/CS
RE0/RD
RE1/WR
65
RD7:RD0
64
Note: Refer to Figure 17-3 for load conditions.
62
63
TABLE 17-8: PARALLEL SLAVE PORT REQUIREMENTS (PIC16F874A/877A ONLY)
Param
No.
Symbol
Characteristic
Min Typ† Max Units Conditions
62
TDTV2WRH Data In Valid before WR ↑ or CS ↑ (setup time)
20 — — ns
63*
TWRH2DTI WR ↑ or CS ↑ to Data–in Invalid
(hold time)
Standard(F)
Extended(LF)
20 — — ns
35 — — ns
64
TRDL2DTV RD ↓ and CS ↓ to Data–out Valid
— — 80 ns
65
TRDH2DTI RD ↑ or CS ↓ to Data–out Invalid
10 — 30 ns
* These parameters are characterized but not tested.
† Data in “Typ” column is at 5V, 25°C unless otherwise stated. These parameters are for design guidance only and are
not tested.
 2003 Microchip Technology Inc.
DS39582B-page 187