Figure D-8 Host Base Address And Host Port Control Registers - Motorola DSP56309 User Manual

Programming Reference
Application:
HOST
Host Base Address Register (HBAR)
Host Request Open Drain
HDRQ HROD
0 0
0 1
1 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)
X:$FFFFC4
Read/Write
Reset = $0
*
= Reserved, Program as 0

Figure D-8 Host Base Address and Host Port Control Registers

D-22
X:$FFFFC5
Reset = $80
HREN/HEW
1
1
1
1
14 13 12 11 10
HRP HCSP HDDS HMUX HASP
DSP56309UM/D
15 8 7 6 5
* *
BA10 BA9 BA8
0 0
Host GPIO Port Enable
0 = GPIO Pins Disable, 1 = GPIO Pin Enable
Host Address Line 8 Enable
0 ® HA8 = GPIO, 1 ® HA8 = HA8
Host Address Line 9 Enable
0 ® HA9 = GPIO, 1 ® HA9 = HA9
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
0
Date:
Programmer:
Sheet 3 of 6
4 3 2 1
BA7 BA6 BA5 BA4
5 4 3 2 1
HAEN HREN HCSEN HA9EN HA8EN HGEN
MOTOROLA
0
BA3
0