7 eonce controller registers, 1 eonce command register (ecr), Eonce controller registers -36 – Freescale Semiconductor StarCore SC140 User Manual
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SC140 DSP Core Reference Manual
EOnCE Controller Registers
4.7 EOnCE Controller Registers
A list of the EOnCE controller registers is given in Table 4-6 on page 4-17. The sections that follow
describe these registers.
4.7.1 EOnCE Command Register (ECR)
The ECR is a write-only 16-bit shift register that receives its serial data from the TDI input signal. This
register is accessed only using JTAG.
Figure 4-15 displays the bit configuration of the ECR.
The shaded bits are reserved and should be initialized with zeros for future software compatibility.
Figure 4-15. EOnCE Command Register (ECR)
Table 4-13 describes the ECR fields.
BIT 15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
BIT 0
R/W
GO
EX
REGSEL
TYPE
w
w
w
w
w
w
w
w
w
w
w
w
w
w
w
w
RESET
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Table 4-13. ECR Description
Name
Description
Settings
R
Bits 15-10
Reserved
R/W
Bit 9
Read/Write Command — Specifies the
direction of data transfer.
0 = Write the data associated with the command into
the register specified by REGSEL.
1 = Read the data contained in the register specified
by REGSEL.