Fujitsu FR81S ユーザーズマニュアル
CHAPTER 4: OPERATION MODE
5. Operation
FUJITSU SEMICONDUCTOR LIMITED
CHAPTER : OPERATION MODE
FUJITSU SEMICONDUCTOR CONFIDENTIAL
10
5.2. Fetching the Operation Mode
The fetching the operation mode is shown.
The operation mode is fetched by sampling the RST (Reset). During the time when an RST is issued and
when it is released, the MD0, MD1 and P006 pin inputs must be determined. (The P006 pin needs not be
determined in the User mode.)
The following shows an operation sequence from an occurrence of reset cause to the determination of an
operation mode.
Figure 5-1 Operation Mode Fetch Timing Chart
Notes:
(*1) Continue fixing MD0, MD1 and MD2 pins even after operating mode determined.
·
·
When in serial writer mode, the P127 pin needs not be fixed after operating moded
etermined.
(*1)
(*1)
When the initialize reset (INIT) occurs;
When reset (RST) occurs;
(oscillation stabilization
wait time) +
PCLK4 cycles
PCLK16
cycles
PCLK16
cycles
PCLK4
cycles
PCLK16 cycles
+ Chip reset sequence
<Before operating mode determined>
<After operating mode determined>
<Before operating mode determined>
<After operating mode determined>
L
Bus idle waiting
PCLK
Factor
PCLK
Factor
INIT
(Settings initialization
reset)
Operation mode
pin
RST
(Operation initialization
reset)
INIT
(Settings initialization
reset)
Operation mode
pin
RST
(Operation initialization
reset)
Chip reset sequence
When the initialization reset (INIT) occurs;
RST
(Setting initialization
reset)
"L"
Notes: (*1) Continue fixing MD0 and MD1 pins even after operating mode determined.
When in serial writer mode, the P006 pin needs not be fixed after operating mode determined.
MB91520 Series
MN705-00010-1v0-E
159