UPD75216ACW

Manufacturer Part NumberUPD75216ACW
Description4-BIT SINGLE-CHIP MICROCOMPUTER
ManufacturerNEC
UPD75216ACW datasheet
 


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Table 8-1 Hardware Statuses after Reset
Hardware
Program counter (PC)
PSW
Carry flag (CY)
Skip flag (SK0 to SK2)
Interrupt status flag (IST0, IST1)
Bank enable flags (MBE, RBE)
Stack pointer (SP)
Data memory (RAM)
General registers (X, A, H, L, D, E, B, C)
Bank select registers (MBS, RBS)
Basic interval
Counter (BT)
timer
Mode register (BTM)
Timer/event
Counter (T0)
counter
Modulo register (TMOD0)
Mode register (TM0)
Timer/pulse
Modulo register (MODH, MODL)
generator
Mode register (TPGM)
Watch timer
Mode register (WM)
Serial
Shift register (SIO)
interface
Mode register (SIOM)
Clock
Processor clock control register (PCC)
generator
System clock control register (SCC)
Interrupt
Interrupt request flag (IRQ
Interrupt enable flag (IE
Priority select register (IPS)
INT0 and INT1 mode registers (IM0, IM1)
Digital port
Output buffer
Output latch
Input/output mode register (PMGA, PMGB)
Port H
Output latch
FIP controller/
Display mode register (DSPM)
driver
Digit select register (DIGS)
Dimmer select register (DIMS)
Display data memory
Output buffer
Power on flag (PONF)
* 1. Data of data memory addresses 0F8H to 0FDH becomes indeterminate by RESET input.
2. 1 upon power-on reset, indeterminate after RESET input in operation.
RESET Input in Standby Mode
Sets the low-order 6 bits of program
memory address 0000H to PC
the contents of address 0001H to PC
Hold
0
0
Sets bit 6 of program memory address
0000H to RBE and bit 7 to MBE.
Undefined
Hold*1
Hold
0, 0
Undefined
0
0
FFH
0
Hold
0
0
Hold
Only bit 4 set to 1, other bits set to 0
0
0
)
Reset (0)
)
0
0
0, 0
Off
Clear (0)
0
Hold
0
1000B
0
Hold
Off
Hold
PD75216A
RESET Input upon
Power-on Reset or
in Operation
Same as left
and
13-8
.
7-0
Undefined
0
0
Same as left
Undefined
Undefined
Undefined
0, 0
Undefined
0
0
FFH
0
Undefined
0
0
Undefined
Only bit 4 set to 1, other bits set to 0
0
0
Reset (0)
0
0
0, 0
Off
Clear (0)
0
Undefined
0
1000B
0
Undefined
Off
1 or undefined*2
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