tmp19a43fd TOSHIBA Semiconductor CORPORATION, tmp19a43fd Datasheet - Page 64

• Manufacturer Part Number: tmp19a43fd
• Description: 32-bit Risc Microprocessor
• Manufacturer: TOSHIBA Semiconductor CORPORATION

FLCS
(0xFFFF_E520) Read/Write
4.4 Register
Flash control/status register
This register shows the status of flash memory being monitored and the block protect status of flash memory.
Bit Symbol
After reset
by power-on
Bit Symbol
Read/Write
After reset
by power-on
Bit Symbol
Read/Write
After reset
by power-on
Bit Symbol
Read/Write
After reset
by power-on
Function
Function
Function
Function
Bit 0: Ready/Busy flag bit
(Note)
Bit 2: ROM type identification bit
The RDY/BSY output is provided to identify the status of auto operation. This bit is a functional
bit for monitoring this function by communicating with the CPU. If flash memory is in auto
operation, "0" is output to show that flash memory is busy. As flash memory completes auto
operation and goes into a ready state, "1" is output and the next command will be accepted. If the
result of auto operation is faulty, this bit continues to output "0." It returns to "1" upon a hardware
reset.
This bit is used to identify the type of flash ROM or the type of mask ROM based on the value
after a reset.
Bit [7:4]: Protect bit (x: A combination setting can be made for each block)
The protect bit (4-bit) value corresponds to the protect status of each block. If this bit is "1," the
corresponding block is in a protected state. A protected block cannot be overwritten.
Flash ROM: "0"
Mask ROM: "1"
Before issuing a command, make sure that flash memory is in a ready state.
If a command is issued when flash memory is busy, a right command cannot
be generated and there is the possibility that subsequent commands may not
be able to be input. In this case, you must return to a normal functional state
by executing a system reset or issuing a reset command.
Protect area setting (in units of 128 KB)
0000: All blocks unprotected
ÔMASKæ”1111”Õ
BLPRO3
xxx1: Block 0 protected
xx1x: Block 1 protected
x1xx: Block 2 protected
1xxx: Block 3 protected
(1)
15
23
31
7
0
0
0
0
BLPRO2
(1)
Table 4-2 Flash Control Register
14
22
30
6
0
0
0
0
TMP19A43 (rev2.0) 4-5
R
BLPRO1
(1)
13
21
29
5
0
0
0
0
BLPRO0
(1)
12
20
28
4
0
0
0
0
"0" is
read.
11
R
19
R
27
R
R
3
0
0
0
0
ROM
identification bit
0: Flash
1: MROM
ROMTYPE
(1)
10
18
26
Various protecting functions
R
2
0
0
0
0
TMP19A43
"0" is
read.
17
25
R
1
0
9
0
0
0
Ready/Busy
0: In auto
1: Auto
(MASK:”1”)
operation
operation
completed
RDY/BSY
16
24
R
0
1
8
0
0
0