
Chapter 15. Registers Page 15-91
* - based on suggested FLOW_LOGIC settings.
This register defines the Master Strobe that causes data to be read or written during a flow state.
For transactions where GPIF is the slave on the bus, the Master Strobe will be one of the RDY[5:0]
pins. This includes external masters that can either write data into GPIF (e.g., UDMA IN) or read
data out of GPIF.
For transactions where GPIF is the master on the bus, the Master Strobe will be one of the
CTL[5:0] pins. This includes cases where the GPIF writes data out to a slave (e.g., UDMA OUT) or
reads data from a slave.
Bit 7 SLAVE
0: GPIF is the master of the bus transaction. This means that one of the CTL[5:0] pins will be
the Master Strobe and the particular one is selected by MSTB[2:0].
Table 15-18. Control Outputs (CTLx) During the Flow State
TRICTL Control Output Output State
Drive Type
(0 = CMOS,
1 = Open-Drain)
Output Enable
0
CTL0 FLOWEQxCTL.0 GPIFCTLCFG.0
N/A
(CTL Outputs are always
enabled when TRICTL = 0)
CTL1 FLOWEQxCTL.1 GPIFCTLCFG.0
CTL2 FLOWEQxCTL.2 GPIFCTLCFG.0
CTL3 FLOWEQxCTL.3 GPIFCTLCFG.0
CTL4 FLOWEQxCTL.4 GPIFCTLCFG.0
CTL5 FLOWEQxCTL.5 GPIFCTLCFG.0
1
CTL0 FLOWEQxCTL.0
N/A
(CTL Outputs are
always tristatable
CMOS when
TRICTL = 1)
FLOWEQxCTL.4
CTL1 FLOWEQxCTL.1 FLOWEQxCTL.5
CTL2 FLOWEQxCTL.2 FLOWEQxCTL.6
CTL3 FLOWEQxCTL.3 FLOWEQxCTL.7
CTL4 N/A
(CTL4 and CTL5 are not available when TRICTL = 1)
CTL5
FLOWSTB E6CB
b7 b6 b5 b4 b3 b2 b1 b0
SLAVE RDYASYNC CTLTOGL SUSTAIN 0 MSTB[2:0]
0 0 1 0 0 0 0 0
RW RW RW RW R RW RW RW
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