Host Port Control Register (Hpcr) (X:$Ffffc4); Host Base Address And Host Port Control Registers - Motorola DSP56303 User Manual

Programming Sheets
Application:
HOST
Host Request Open Drain
HDRQ HROD
0
0
1
1
Host Data Strobe Polarity
0 = Strobe Active Low, 1 = Strobe Active High
Host Address Strobe Polarity
0 = Strobe Active Low, 1 = Strobe Active High
Host Multiplexed Bus
0 = Nonmultiplexed, 1 = Multiplexed
Host Dual Data Strobe
0 = Singles Stroke, 1 = Dual Stoke
Host Chip Select Polarity
0 = HCS Active Low
HTRQ & HRRQ Enable
1 = HCS Active High
Host Request Priority
HDRQ HRP
0 0 HREQ Active Low
0 1 HREQ Active High
1 0 HTRQ,HRRQ Active Low
1 1 HTRQ,HRRQ Active High
Host Acknowledge Priority
0 = HACK Active Low, 1 = HACK Active High
15
HAP
Host Port Control Register (HPCR)
Reset = $00
Figure B-11. Host Base Address and Host Port Control Registers
B-22
15 8
* *
0 0
Host Base Address Register (HBAR) X:$FFFFC5 Read/Write
Reset = $80
HREN/HEW
0 1
1 1
0 1
1 1
14 13 12 11 10
HRP HCSP HDDS HMUX HASP
DSP56303 User's Manual
7 6 5 4 3
BA10 BA9 BA8 BA7 BA6
Host GPIO Port Enable
0 = GPIO Pins Disable, 1 = GPIO Pin Enable
Host Address Line 8 Enable
0 HA8 = GPIO, 1
Host Address Line 9 Enable
0 HA9 = GPIO, 1
Host Chip Select Enable
0 HCS/HAI0 = GPIO,
1 HCS/HA10 = HC8, if HMUX = 0
1 HCS/HA10 = HC10, if HMUX = 1
Host Request Enable
0 HREQ/HACK = GPIO,
1 HREQ = HREQ, if HDRQ = 0
Host Acknowledge Enable
0 HACK = GPIO
If HDRQ & HREN = 1,
HACK = HACK
Host Enable
0 HI08 Disable
Pins = GPIO
1 HI08 Enable
9 8 7 6
*
HDSP HROD HEN HAEN
0
X:$FFFFC4 Read/Write
Date:
Programmer:
Sheet 2 of 5
2 1 0
BA5 BA4 BA3
HA8 = HA8
HA9 = HA9
5 4 3 2 1
HREN HCSEN HA9EN HA8EN HGEN
*
= Reserved, Program as 0
0