ACE1001 Datasheet, PDF (25/32 Pages) Fairchild Semiconductor – Arithmetic Controller Engine (ACEx™) for Low Power Applications

Figure 21: Programming Protocol¹⁰
A
t_SV1 t_SV2
LOAD (G3)
CLOCK (G1)
enter prog.
mode
32 clock pulses
t_load1 t_load2
SHIFT_IN (G4)
bit 31
bit 30
bit 0
SHIFT_OUT (G2)
(in write mode)
SHIFT_OUT (G2)
(in read mode)
A: start of programming cycle
t_ready
A
t_load3 t_load4
BUSY low by
2nd clock pulse
BUSY
READY
bit 31
Figure 22: Serial Data Timing
t_HI
t_LO
CLOCK (G1)
t_DIS
t_DIH
SHIFT_IN (G4)
Valid
t_DOS
t_DOH
SHIFT_OUT (G2)
t_ACCESS
Valid
25
ACE1001 Product Family Rev. B.1
www.fairchildsemi.com